# XXXVI Reunión Bienal de la Real Sociedad Española de Física

Aula Magna (Santiago de Compostela, Facultade de Química)

### Aula Magna

#### Santiago de Compostela, Facultade de Química

Av. das Ciencias s/n, 15701 Santiago de Compostela, A Coruña, Spain
Description
The next Biennial Meeting of the RSEF will take place in Santiago de Compostela, from July 17th to 21st 2017. The meeting venue will be at the Faculty of Chemistry. This meeting follows those held in Gijón in 2015 and in Valencia in 2013.
Support
• Monday, 17 July
• 08:30 09:15

#### Santiago de Compostela, Facultade de Química

Av. das Ciencias s/n, 15701 Santiago de Compostela, A Coruña, Spain
• 09:15 13:20
Plenary I Aula Magna

### Aula Magna

#### Santiago de Compostela, Facultade de Química

Av. das Ciencias s/n, 15701 Santiago de Compostela, A Coruña, Spain
• 09:15
Opening 45m
• 10:00
The European “Energy Transition” Revisited 50m
There is worldwide consensus to reduce energy consumption and emissions of greenhouse gases in the atmosphere. The ‘energy transformation’ is surely one of the most important challenges of the 21st century. Correct planning and thorough insight into the complexities of energy systems are an absolute necessity before starting such a task, in order to avoid unnecessary disruptions in the economy and daily life of the citizens. The European Union has ambitious plans n this direction for the coming decades. However, there is no simple answer to the best way forward. In the electricity sector emphasis is currently put on massive developments in renewable systems (wind, solar, hydro, biomass,…). As wind and solar are main components, the consequences of the intermittency need to be fully understood. Important components for a green electricity system dominated by intermittent sources are still lacking and developing these is challenging and will take time. Therefore it is not justified to eliminate any of the non-renewable options in near future and future electricity policies. The plans of the EU need also to be shaped in the context of worldwide greenhouse gas emissions and estimated future world energy needs. The effectiveness of green electricity policies implemented in the EU so far will be discussed using the example of the Germany. A last but very important remark is about the information for the general public. Unfortunately, the quality of public and political discussions on this subject is a matter of great concern, as these frequently lack reference to realistic numbers, or use numbers very selectively. Even worse, critical discussions are very often simply ignored or rebuffed with unfounded black and white arguments. Given the importance of sufficient and high quality energy sources for the welfare of all citizens on this planet in the future, there is an important role for education. This should be an important asset in order to arrive at a correctly defined and affordable sustainable future energy supply.
Speaker: Prof. Josef Ongena
• 10:50
Coffee break and poster session 30m
• 11:20
Tiny Objects and Big Science: Light and Shadows 50m
The explanation of the nature and dynamics of visible matter present in the universe is one of the most successful theories in relativistic quantum physics. The discovery of the Higgs Boson in 2012 marked the end of a very fruitful era as well as the start of much more uncertain times. If the theory of particle physics stands out for its simplicity and beauty the experimental program, based on gigantic accelerators and particle detectors, paved the way for what now has become almost the standard in science, the big science. In this talk, I will present an overview the state of the art in the field of particle physics and the challenges ahead.
Speaker: Prof. Teresa Rodrigo (IFCA)
• 12:10
FAIR - The Universe in the Laboratory 50m
FAIR - The Universe in the Laboratory FAIR will be the next-generation facility for fundamental and applied research with antiprotons and ion beams. It will provide world-unique accelerator and experimental facilities, allowing for a great variety of unprecedented forefront research in physics and applied sciences. FAIR is an international project with 10 partner countries and more than 2500 scientists and engineers from more than 50 countries involved in the planning and construction of the accelerators and associated experiments. FAIR research focuses on the structure and evolution of matter on both a microscopic and a cosmic scale, bringing our Universe into one laboratory. In particular, FAIR with its four scientific pillars will expand the knowledge in various scientific fields beyond current frontiers, addressing the following: - The properties of the strong force and its role in shaping the basic building blocks of the visible world around us and in the evolution of the universe; - Test of symmetries and predictions of the Standard Models, as well as the search for physics beyond it; - The properties of matter under extreme conditions, at both the subatomic and the macroscopic scale of matter; and - Applications of high-intensity, high quality beams in research areas that provide the basis for, or indirectly address, issues of applied sciences and technology. In particular FAIR will open a new era in nuclear astrophysics. The talk will introduce FAIR, its unique scientific Opportunities, and the status of the realization of the project.
Speaker: Prof. Paolo Giubelino
• 13:00
The RSEF Exterior Section 20m
"Recently the RSEF has created an Exterior Section, aiming at representing the members that are staying abroad. In this talk we give an overview of the Exterior Section. We will present our members, our main goals, the organized and planned activities, agreements with other scientific associations, and our future action plans. "
Speaker: Prof. Antonio Picón
• 13:20 15:00
Lunch break 1h 40m Campus Vida USC

#### Campus Vida USC

• 15:00 20:00
Nuclear Physics I Aula Química Física (Facultade de Química (USC))

### Aula Química Física

• 15:00
Highlights of the ISOLDE Facility and the HIE-ISOLDE project 25m Aula Química Física

### Aula Química Física

The ISOLDE Radioactive Beam Facility is the CERN experiment for the production and acceleration of radioactive nuclei. It is dedicated to the production, study and research of nuclei far from stability. Exotic nuclei of most chemical elements are available for the study of nuclear structure, nuclear astrophysics, fundamental symmetries and atomic physics, as well as for applications in condensed-matter and life sciences. Since more than 15 years it offers the largest variety of post-accelerated radioactive beams in the world today. In order to broaden the scientific opportunities beyond the reach of the present facility, the on-going HIE-ISOLDE (High Intensity and Energy) project will provide major improvements in energy range, beam intensity and beam quality. The first stage has boosted the beam energy of the current REX LINAC to 5.5 MeV/u where the Coulomb excitation cross sections are strongly increased with respect to the previous 3 MeV/u and many transfer reaction channels become available. The second stage of the energy upgrade is being implemented; most of the infrastructure was installed in the winter of 2017, and it will be completed for the start of 2018, allowing energies of the beam up to 10 MeV/u. In this contribution, recent highlights of the ISOLDE facility will be discussed and the HIE-ISOLDE project will be described together with a panorama of the physics cases addressed and a few examples of experiments already realized.
Speaker: Prof. Maria J. G. Borge (Instituto de Estructura de la Materia, CSIC)
• 15:25
Commissioning of the BRIKEN β-delayed neutron detector for the study of exotic neutron-rich nuclei 15m Aula Química Física

### Aula Química Física

Beta-delayed neutron emission βn is the dominant decay mode of the most exotic nuclei produced along the path of the rapid neutron capture process. The correct description of the final relative abundances of heavy elements requires a accurate knowledge of delayed neutron emission probabilities Pxn of very neutron-rich nuclei [1]. Our current understanding of this nuclear decay mode lacks of enough experimental data [2]. Furthermore, the Pxn values are sensitive to the nuclear structure, and can be used as test of theoretical models [3]. With these ideas in mind the BRIKEN Collaboration has set up a powerful detection system consisting of: 1) a neutron counter with 148 3 He tubes that has high and constant detection efficiency [4], 2) the high granularity implantation-decay detector AIDA [5], 3) two CLOVER type HPGe detectors. The setup will exploit the high intensity of radioactive beams available at the focal plane of the BigRIPS separator [6] in the RIKEN Nishina Center. The setup received the first radioactive beam of isotopes close to the doubly-magic 78 Ni in Autumn 2016.In this presentation we will report on the first results of this commissioning run, including an evaluation of the performance of the setup. [1] A. Arcones and G. Martinez-Pinedo, Phys. Rev. C 83,045809 (2011) ; [2] R. M. Mumpower et al., Phys. Rev C 94, 064317 (2016); [3] M. Madurga et al., Phys. Rev. Lett. 117, 092502 (2016); [4] A. Tarifeno-Saldivia et al., J. Instrum. 12 (2017) 04006. [5] T. Davinson et al., http://www2.ph.ed.ac.uk/∼td/AIDA/; [6] T. Kubo et al., AIP Conference Proceedings 1224, 492 (2010).
Speaker: Alvaro Tolosa Delgado (Instituto de Fisica Corpuscular, IFIC (CSIC-UV))
• 15:40
Estudio de la estructura de clúster 9Li-4He del núcleo 13B usando el método de dispersión resonante. 15m Aula Química Física

### Aula Química Física

El fenómeno de clúster es bastante conocido en física nuclear, de hecho, algunas propiedades de los núcleos pueden describirse asumiendo únicamente algunas interacciones débiles entre dichos clústeres. Dentro de los núcleos ricos en neutrones, los clusteres pueden ser no sólo partículas estables, como la partícula alfa, sino también núcleos deformados y fácilmente polarizables. Este tipo de estructura se denomina estructura de clúster exótica. Dentro de este marco, los cálculos AMD (Antisymmetrized Molecular Dynamics) predicen una estructura del tipo Li-He para los isótopos de B ricos en neutrones. En esta contribución se presenta el primer estudio experimental de los estados de clúster exótico 9Li-4He en el núcleo de 13B usando la técnica de dispersión resonante. La función de excitación obtenida de 13B muestra la presencia de varios picos en una región de energía de excitación nunca antes explorada.
Speaker: Dr. Juan Pablo Fernandez-Garcia (CNA-University of Seville)
• 15:55
Gamma and fast-timing spectroscopy around 132Sn from the beta-decay of In isotopes 15m Aula Química Física

### Aula Química Física

During the last two decades there has been a substantial effort directed to gather information about the region around the neutron-rich 132Sn [1], the most exotic doubly-magic nucleus presently at reach. Nuclei with a large N/Z ratio in this area of the table of isotopes are of great interest to test nuclear models and provide information about single particle states. Stringent tests of the models can be provided by the reduced electromagnetic transition probabilities connecting nuclear states. In this work we have used fast-timing and gamma spectroscopy to investigate five Sn nuclei, including the doubly magic 132Sn, the two neutron hole 130Sn and two-neutron particle 134Sn, and the one-neutron hole 131Sn and one-neutron particle 133Sn. The Sn isotopes were studied at the ISOLDE facility, where their excited states were populated in the beta-decay of In isomers, produced in a UCx target unit equipped with a neutron converter. The In isomers were ionized using the ISOLDE Resonance Ionization Laser Ion Source (RILIS), which for the first time allowed isomer-selective ionization of indium. The measurements took place at the new ISOLDE Decay Station (IDS), equipped with four highly efficient clover-type Ge detectors, along with a compact fast-timing setup consisting on two LaBr3(Ce) detectors and a fast beta detector. The setup incorporated a tape transport system to remove longer-lived activities. Indium isotopes with masses ranging from 130 to 134 were produced. The RILIS isomer selectivity made it possible to produce odd-mass In isotopes with a clean separation between the 9/2+ and 1⁄2– beta-decaying isomers. For the even isotopes, such as 130In, it was also possible to separate the 5+, 10– and 1– isomers. We report on the lifetime of the 331-keV 1/2+ level in 131Sn, which provides information on the M1 transition to the ground state and on its degree of forbiddeness, similar to what has been recently been measured for 129Sn [2]. We also report on the expanded level scheme of the 131Sn and the preliminary lifetimes of excited states populated in the decay of the 131In (21/2+) isomer. The 132Sn was studied by means of the beta-decay of 132In, and also from the beta-n decay of the 133In 1/2– isomer and the 133In 9/2+ g.s. separately. We present the new level scheme, which have been enlarged with more than 8 new levels and 40 gamma transitions. A crosscheck of previously measured known lifetimes is also provided [3]. References [1] A. Korgul et al, Phys Rev Lett 113,132502(2014) [2] R. Lica et al., Phys Rev C93 044303 (2016) [3] B. Fogelberg et al Phys. Rev. Lett. 73, 2413(1996)
• 16:10
Quasi-Free Scattering of Neutron Deficient Exotic Nuclei 15m Aula Química Física

### Aula Química Física

Quasi-Free Scattering (QFS) reactions are powerful tool to study to provide information on nuclear single-particle properties. This experimental approach has been extensive in the past to gain information on stable nuclei [1] We have recently extended the method to explore the exotic species. The oxygen isotopic chain brings excellent opportunities covering a very broad range on isospin, raging from weakly bound nuclei, 13O or 24O to stable ones such as 16,17,18O. Previous investigations by L. Atar and P. Fernández [1] in the neutron-rich isotopes (16-24O) proton-induced QFS reactions have been performed. The aim of this work is extending these studies to the proton-deficient area, and investigate (16-13O) nuclear properties. In addition, fragmentation cross sections induced by these nuclei and producing light fragment are relevant in field of charged particle therapy. This technique is advantageous over conventional radiotherapy, thus understanding of these cross sections is important to improve the risk assessment related to this process.
Speaker: Mr. Juan Manuel Boillos Betete (IGFAE Instituto Gallego de Altas Energías)
• 16:25
Dissipative effects in fission investigated in complete kinematics measurements 20m Aula Química Física

### Aula Química Física

A complete description of the fission process still represents a challenge, despite the recent progress based on time-dependent Hartree-Fock models [1]. Statistical models provide a tool to describe fission probabilities at excitation energies around the fission barrier. This approach is justified because, under such conditions, statistical times dominate over the typical timescales for the coupling between intrinsic and collective degrees of freedom (~10-21s). At high excitation energies, pre- and postscission particle emission and fission probabilities [2,3] indicate that simple statistical approaches are not valid and models, describing the dynamics of the process, are required. These models are based on transport equations, e.g. Fokker-Planck or Langevin, where the main ingredients are the potential landscape and the friction and inertia tensors [4]. The friction parameter is particularly interesting because it quantifies the magnitude of the coupling between collective and intrinsic degrees of freedom in fission. In this work, we propose to investigate these effects by taking advantage of proton-induced fission reactions at relativistic energies for producing highly-excited fissioning nuclei with low angular momentum, where dissipative effects should manifest in a clear way. The SOFIA setup together with the inverse kinematics technique were used for the first time to measure in coincidence the mass and atomic number of the two fission fragments with good resolution [5]. These high-quality data allowed us to obtain new observables in fission. In particular, total and partial fission cross sections and the charge distribution of the fission fragments are used to characterize the fission dynamics at small deformation [6]. Moreover, we will also present the results concerning the neutron excess and the average pre- and postneutron multiplicities, which help us to investigate the postsaddle dynamics [7]. References [1] G. Scamps et al., Phys. Rev. C 91, (2015) 044606 [2] J. P. Lestone et al., Phys. Rev. C 79, (2009) 044611 [3] J. Benlliure et al., Phys. Rev. C 74, (2008) 014609 [4] P. N. Nadtochy et al., Phys. Rev. C 65, (2002) 064615 [5] J. L. Rodríguez-Sánchez et al., Phys. Rev. C 91, (2015) 064616 [6] J. L. Rodríguez-Sánchez et al., Phys. Rev. C 92, (2015) 044612 [7] J. L. Rodríguez-Sánchez et al., Phys. Rev. C 94, (2016) 061601(R)
Speaker: Mr. Jose Luis Rodriguez Sanchez (USC)
• 16:45
Coffee 30m Aula Química Física (Facultade de Química (USC))

### Aula Química Física

• 17:15
A Beyond Mean Field Description of Atomic Nuclei 25m Aula Química Física

### Aula Química Física

Traditionally effective interactions like Skyrme, Gogny or relativistic interactions have been used in basic mean field approaches to describe with great success bulk properties of ground states of nuclei, such as masses, quadrupole moments, radii, etc. However, recent developments in beyond mean field calculations, with particle number and angular momentum projection in conjunction with the Generator Coordinate Method (with the deformations $(\beta,\gamma)$, pairing gaps $(\Delta_Z,\Delta_N)$ and angular frequency as generator coordinates) have shown that the Gogny force [1,2] is also able to provide high quality nuclear spectroscopy. This approach has recently been extended to odd-even nuclei [3] allowing thereby to perform isotopic (isotonic) studies of nuclear properties. The strong point of this approach is the ability to simultaneously provide a good description of bulk properties, like binding energies and multipole moments, as well as an accurate and detailed account of excitation energies and transition probabilities. As a validation of the theory in this talk we present a study of the Magnesium isotopic chain. We obtain an outstanding description of the ground-state properties, in particular binding energies, odd-even mass differences, mass radii and electromagnetic moments among others. At the same time a comprehensive study of the spectroscopic properties of $^{25}$Mg is discussed. These studies, together with the spectrum and the transition probabilities of the nuclei $^{42}$Si and $^{44}$S, show that these calculations provide an accuracy comparable with state-of-the-art shell model calculations with tuned interactions. The advantages of the present approach as compared to the shell-model one are the added value of the intrinsic system interpretation and that the interaction, the Gogny force, is well known for its predictive power and good performance for bulk properties all over the chart of nuclides. \vspace{1cm} 1.- M. Borrajo, T. R. Rodriguez and J. L. Egido, Phys. Lett. B 746 (2015) 341-346 2.- J. L. Egido, M. Borrajo and T. R. Rodriguez, Phys. Rev. Lett. 116 (2016) 052502. 3.- M. Borrajo and J. L. Egido, Phys. Lett. B 764 (2017) 328–334
• 17:40
Exploiting electron parity violation: from Standard Model tests to dark matter detection predictions 15m Aula Química Física

### Aula Química Física

There has been recent interest in low energy, high luminosity polarized electron beams for studies of parity-violating electron scattering, such as the MESA accelerator at Mainz or an upgraded FEL facility at Jefferson Lab. Accurate measurements of the parity-violating asymmetry in elastic electron scattering from nuclei can be used to determine Standard Model couplings, such as the weak-mixing angle, or higher-order radiative corrections, as well as to extract specific information on the nuclear and nucleon structure. To this end, low uncertainties are required from modeling some confounding nucleon and nuclear structure effects, including isospin mixing, nucleon strangeness content or Coulomb distortion. We estimate the sizes and theoretical uncertainties of such effects for a proton and a carbon 12 targets. An experimental precision in the asymmetry of a few tenths of a percent may be reachable under certain kinematic conditions, that are also discussed here for the same nuclear target. This high precision parity-violating asymmetry in elastic electron scattering can also be used to relate in a very simple manner the elastic electron-nucleus scattering cross section with the elastic weak-neutral neutrino-nucleus cross section for even-even targets or, more generally, for any target in coherent scattering. This novel relationship allows us to exploit experimentally well-determined quantities (related to electron-nucleus scattering) to predict as-yet unknown observables (weak neutral neutrino-nucleus cross sections). This idea is simply extended to link electron scattering to an even more uncertain magnitude: the detection rate of weak-interacting massive particles, that are dark matter candidates.
• 17:55
Proton-neutron pairing studied with transfer reactions 15m Aula Química Física

### Aula Química Física

Pairing correlations in nuclei is one of the most active fields in Nuclear Physics. It is crucial for understanding different processes and characteristics of nuclei such us superfluidity. We can easily found clear situations where neutrons form strongly correlated pairs with total angular momentum J=0 and isospin T=1. This produces a strong enhancement of two-neutron transfer reactions, thus being the main probe to test correlations. In N=Z nuclei one would expect to observe also a strong correlation between neutrons and protons. Here, we can find isovector pairs with J=0; T=1 but also isoscalar ones with J=1; T=0. However, the existence and magnitude of pn isoscalar pairing is still under debate. Many experiments on np transfer have been made along the N=Z line but very few performed and analyzed systematically along a major shell. In this contribution, we analyze (p,3He) and (3He,p) transfer reactions in N=Z sd-shell nuclei. The exclusive cross sections to the lowest 0+ and 1+ states in the odd-odd N=Z nuclei were populated in a series of experiments performed at Grand Raiden high-resolution spectrometer at the RCNP of the Osaka University. These data will be compared to 2nd-order DWBA calculations with proton-neutron amplitudes obtained in the Shell Model formalism by using USDB interaction. The preliminary analysis shows tentative cases where the pn isoscalar pairing is not negligible and need to be taken into account in order to reproduce the present experimental data.
Speaker: Mr. Lay Valera José Antonio (Universidad de Sevilla)
• 18:10
Symmetry energy and the neutron star core-crust transition with Gogny forces 15m Aula Química Física

### Aula Química Física

An accurate determination of the core-crust transition is necessary in the modelling of neutron stars for astrophysical purposes. The properties of the transition are intimately related to the isospin dependence of the nuclear forces at low baryon densities. Finite-range Gogny nuclear interactions are widely used in nuclear structure calculations but there are fewer studies of neutron stars with these interactions. In this work, we investigate the core-crust transition in neutron stars using several Gogny forces and analyse the deduced crustal thickness and crustal moment of inertia of the star. In a first stage, we calculate the second-, fourth- and sixth-order coefficients of the Taylor expansion of the energy per particle of asymmetric nuclear matter in powers of the isospín asymmetry for Gogny forces. These coefficients provide information about the departure of the symmetry energy from the widely used parabolic law and can influence significantly the results for the location of the inner Edge of neutron star crusts. Next, we evaluate the neutron star core-crust transition density by looking at the onset of thermodynamical instability of the liquid core. The analysed Gogny forces predict the ranges 0.094 fm-3 ≤ ρt ≤ 0.118 fm-3 for the transition density and 0.339 MeV fm-3 ≤ Pt ≤ 0.665 MeV fm-3 for the transition pressure. The transition densities of the Gogny forces show an anticorrelation with the slope parameter L of the symmetry energy, whereas the transition pressures are not found to correlate with L. Finally, the fraction of the mass and moment of inertia of the neutron star that reside in the crust are evaluated using the forces that provide stable solutions of the Tolman-Oppenheimer-Volkov equations.
Speaker: Ms. Claudia Gonzalez-Boquera (Universitat de Barcelona)
• 18:25
Evidencia experimental de caos en los estados ligados del 208Pb 15m Aula Química Física

### Aula Química Física

• 18:40
Transfer to the continuum calculations of (p, pn) and (p, 2p) reactions at intermediate and high energies. Application to Borromean nuclei. 15m Aula Química Física

### Aula Química Física

Nucleon removal (p,pn) and (p,2p) reactions at intermediate energies have gained renewed attention in recent years as a tool to extract information from exotic nuclei, thanks to the availability of exotic beams with which to perform these reactions in inverse kinematics. These reactions explore the single-particle structure of the projectile nucleus and are complementary to nucleon removal experiments with heavier targets (knockout), due to their enhanced sensitivity to the nuclear interior. Of special interest is their application to Borromean nuclei, three-body systems whose two-body subsystems are all unbound, since their exotic nature makes their structure a topic of current interest.
Speaker: Mr. Mario Gómez Ramos (Universidad de Sevilla)
• 18:55
Parity violating electron scattering 20m Aula Química Física

### Aula Química Física

Nucleons are not point like particles, they are made of quarks interacting each other by exchanging gluons. Gluons can be converted into quark-antiquark pairs giving raise to the sea quark. Quantum Chromodynamics (QCD) is the fundamental theory that describes the strong interaction; however, due to the complexity of the quark-gluon dynamics, QCD does not allow us to get analytical results in the energy region of interest to Nuclear Physics at low 4-momentum transfer, $Q^2$. Alternatively, the internal dynamics of the quarks inside the nucleon can be described in terms of several phenomenological functions (form factors) which depend on a single scalar variable: $Q^2$. The form factors are related to the electric, magnetic, axial and axial-vector charge distributions in the nucleon. The study and determination of these nucleon form factors can provide constraints to the microscopic models that aim to describe the nucleonic structure from QCD. Moreover, form factors are a main ingredient for the description of the lepton-nucleus/nucleon cross sections. One of the main objectives of our work is to improve the current knowledge on the structure of the nucleon through the study of the form factors. As tools, we have analyzed elastic electron-nucleon and quasielastic electron-nucleus scattering processes. These reactions provide information on the electromagnetic (EM) and weak neutral current (WNC) form factors. Although the EM interaction is dominant in electron-nucleon/nucleus scattering, i.e., parity conserving processes, the electron also feels the weak (neutral) interaction that does not conserve parity. Due to the strength of the weak interaction (several orders of magnitude lower than the electromagnetic one) to get information on the weak interaction is essential to analyze observables whose presence is due unequivocally to parity violating processes. Thus, we have studied the observable called parity violating asymmetry (${\cal A}^{PV}$) defined as ${\cal A}^{PV}=(\sigma^+ - \sigma^-)/(\sigma^+ + \sigma^-)$, where $\sigma^{+/-}$ represents the differential cross section (electron-proton or electron-nucleus) with positive/negative helicity of the incident electron. The PV asymmetry linked to the elastic electron-proton scattering (PVep asymmetry), $p(\vec{e},e')p$, is particularly sensitive to the electric and magnetic strange contributions. An statistical analysis of all PVep asymmetry data has also been presented. From this analysis we have got the highest precision constraint for the vector strange form factor compatible with the experimental data up to date. We have also presented a general study of the PV asymmetry associated to quasielastic electron-nucleus scattering processes (PVQE asymmetry). From our analyses we conclude that the PVQE asymmetry is an excellent observable to obtain nucleonic information on the axial-vector sector of the weak neutral current. Specifically, measurements of the PVQE asymmetry at backward scattering angles would provide information on the radiative corrections entering in the isovector axial-vector sector.
Speaker: Dr. Raul Gonzalez Jimenez (Ghent University)
• 19:15
The Laser Laboratory for Acceleration and Applications 15m Aula Química Física

### Aula Química Física

The development of high power laser systems based on the Chirped Pulse Amplification (CPA) technique [1] has lead to the advancement of the so called laser driven plasma accelerators. By focusing an ultra-intense ultra-short laser pulse in a target material, it is possible to produce accelerating gradients above 10 GeV/m, which are some 3 to 4 orders of magnitude larger than the values reached using conventional accelerators based on radiofrequency cavities. This achievement has generated during the last decade an intense research activity leading to the discovery of the physical mechanisms that can be used to produce high energy beams of electrons, ions or photons with unprecedented characteristics [2]. The Laser Laboratory for Acceleration and Applications (L2A2) at the University of Santiago de Compostela in Spain is a new infrastructure for the investigation of laser-plasma particle acceleration and the use of this new technology in several fields of application. In particular, L2A2 will focus its initial research program in developing alternative technologies for the production of medical radiotracers using laser-plasma accelerated beams of protons and light ions. Another field of interest is advanced tomographic techniques using laser-plasma generated X-rays.
Speaker: Dr. Jose Benlliure (University of Santiago de Compostela)
• 19:30
POSTERS 30m Aula Física (Santiago de Compostela, Facultade de Química)

### Aula Física

#### Santiago de Compostela, Facultade de Química

• 15:15 19:05
27º Encuentro Ibérico de Enseñanza de la Física I Aula de Biología (Facultad Química (USC))

### Aula de Biología

• 15:15
Experimentos para la formación de profesores 1h 15m
Experimentos para la formación de profesores
Speaker: Prof. Benito Vázquez (Universidad de Vigo)
• 16:30
Proyectos de innovación en la enseñanza de la Física 30m
Proyectos de Innovación en la enseñanza de Física
Speaker: Prof. José Viñas
• 17:00
Coffee break 30m
• 17:30
Introducción del programa de simulación de circuitos eléctricos PSpice en el laboratorio de Física General 15m
Este trabajo, basado en un proyecto de innovación docente desarrollado con estudiantes de diferentes grados de la rama de ingeniería industrial, describe las líneas básicas que permiten introducir los programas de simulación de circuitos eléctricos en el laboratorio de física general. Se seleccionan varias prácticas de laboratorio basadas en análisis de circuitos de corriente continua, análisis transitorios y análisis de circuitos de corriente alterna, y se muestran ejemplos de cómo profesores y estudiantes pueden usar los programas de simulación para hacer actividades simples asociadas con los propios ejercicios de laboratorio o con tópicos relacionados.
Speaker: Dr. Antonio Angel Moya (Universidad de Jaén)
• 17:45
Caracterización de oscilaciones forzadas mediante el sensor de aceleración de un smartphone 15m
Speaker: Mrs. Isabel Salinas Marín (Departamento de Física Aplicada, Universitàt Politècnica de València)
• 18:00
Adquisición de competencias transversales mediante laboratorios virtuales 15m
Speaker: Dr. Marcos H. Giménez Valentín (Universitat Politècnica de València)
• 18:15
Formación en metodologías activas a través de proyectos europeos en el Master del Profesorado 15m
Speaker: Dr. Miguel Angel Queiruga Dios (Colegio Jesús-María. Universidad de Burgos)
• 18:30
TRATANDO DE DESMONTAR LA ARTIFICIAL BARRERA ENTRE FÍSICA Y BIOLOGÍA EN LA FORMACIÓN DE FUTUROS BIÓLOGOS. Lecciones de una experiencia (2010-2015) en un Grado en Biología. 15m
Speaker: Dr. del Romero Guerrero Armando (Universidad de Alcalá, España)
• 18:45
16 experimentos de física que comparan el proceso real con una simulación 15m
Speaker: Dr. MANUEL FRANCISCO ALONSO SÁNCHEZ (IES "LEONARDO DA VINCI" DE ALICANTE)
• 15:15 19:15
Energy and Sustainability I Aula de Física (Facultad Química (USC))

### Aula de Física

• 15:15
Present state of the power system in Spain and the optimal development of a future variable renewable energy (VRES) mix 30m
As the percentage of electricity from variable renewable energies, (wind and solar) gets above some 30-40% of the mix, the problems of integrating the VRES supply into the distribution grid rise significantly. In fact, the characteristic intermittency of renewable sources necessarily demands for its effective integration some combination of efficient and flexible backup plants, large energy storage systems, smart grids, etc. and, consequently, the costs of electricity could be notably increased. This article analyses the present situation of the power mix making use of the latest data available from the Spanish distribution grid regulator (Red Eléctrica Española). The study is carried out in a two-tier analysis: Firstly we perform a descriptive analysis of the latest trends comparing the generation of the last years. Secondly, based mainly on the European directions on the future limitations of CO2 emissions, we make an analysis of the deployment of the optimal mix of VRES that would minimize the both the need of backup from conventional sources, as well as surpluses. A reduction in fossil fuel generation, as recommended by the European Union (EU) and several international treaties, is also considered. As far as we know, this kind of studies, based on linear programming for establishing the optimal power generation mixes for VRES at a country level, are unusual and yet to come. However, they can provide key figures to policymakers for the establishment of desirable investments for renewable energies in the nearly future. Evidently, the main difficulty of the above study is caused by the large unpredictability of wind and solar resources and for this reason we base our optimization technique on the hourly data series (8760 hours in one year) provided by REE. It is also interesting to point out that in finding the optimal mix for VRES, we have considered two components for solar: photovoltaics (PV) and concentrating solar power (CSP). Practically, none of the European scenarios take into account these two solar components since it is known that for latitudes higher than the one of Spain, the conversion efficiency of CSP diminishes very rapidly. In this work we have studied three possible scenarios. In the first one we suppose the hypothetical case of the total demand being mostly supplied by variable renewable energies. In this case, it is assumed that all the electricity demand is covered by wind and solar energies (PV and CSP). To do so in the solution of the problem we apply the stringent condition that the resulting mix should be optimal, that is, that the 8760 hourly periods in the year of backup and surplus are simultaneously minimized. The solution of the problem gives, as expected that the increase in VRES needed is too large to be implemented before 2030. In addition the amounts of surplus and backup are also unmanageable without an efficient storage and lack of demand-side response technologies. In the second case we suppose that the hydraulic and nuclear generation are maintain ned at their present levels. Therefore, the VRES should cover only the reduced demand, that is, the difference between the total demand minus the sum of the hydraulic and nuclear components for each of the hours of the year. Under this situation, the solution of the optimization problem yields that the present wind, solar-PV and solar-CSP generations would have to be increased by 97%, 20%, and 528%, respectively. In this case, we have also calculated the aggregated yearly backup needed and the surplus obtaining 14.2 and 5.7 TWh, respectively. It is also evident that without storage the surplus electricity would be lost. In the third scenario we study the more realistic case that Spain will follow the targets assigned by the EU for the reduction of emissions in 2030 as well as the increase of the corresponding renewable energies. This implies a drastic reduction in the future coal-generated electricity reaching 15.2 TWh by 2030 (about 30% of its present amount). We call this case, the European Union-2030 Scenario. After performing the corresponding operations for the optimization problem, as in the previous case, we find that the current wind, PV and CSP generations would have to be augmented by 64%, 27%, and 332%, respectively. In addition, the yearly backup and surplus have been drastically reduced to 2.9 and 3.3 TWh, respectively. We would like to remark that it might appear surprising the large percentages resulting for CSP which can be explained by its low present participation in the actual generation mix and above all by its possibility of evening and overnight storing of energy during several hours after sunset. It is important to remark that the needed backup will be mainly supplied by natural gas plants, which are less contaminating and have a faster response than coal plants. Finally, in this communication, we also discuss other strategies that will have to be implemented if we want to handle large amounts of VRES. These are storage, demand-side management, distributed generation, and smart grids, since they contribute to the improvement of the so-called flexibility of the systems for power generation. With respect to the management of the surplus, evidently storage could in theory accumulate the corresponding energy for later use, thus partially substituting the backup systems. However, a massive use of storage still has to wait due to the high cost of batteries and the need of a practical seasonal storage (summer-to-winter in the case of solar) yet to be developed. Acknowledgments The authors would like to acknowledge the support given by the Spanish Royal Physics Society (RSEF) and Red Eléctrica Española (REE) for the realization of this work. We also acknowledge the fruitful technical discussions maintained with Enrique Soria and Javier Domínguez from the Renewable Energy Department of CIEMAT.
Speaker: Dr. Roberto Gómez-Calvet (Universidad Europea de Valencia)
• 15:45
Planta de biogás de un matadero de aves. Un ejemplo de economía verde. 30m
Los mataderos de aves generan efluentes líquidos compuestos de grasas, proteínas y restos de animales. También generan desechos sólidos, tales como huesos, patas, cabezas, piel y otros restos de carcasas. Normalmente, estos desechos no son utilizados por las empresas y a menudo son enviados a vertederos o destinados para la producción de compost, que, en el caso de los residuos avícolas, poseen un alto contenido en nitrógeno teniendo un impacto medioambiental negativo. Si se tratan mediante digestión anaerobia (DA), se consigue, por una parte, disminuir muchísimo el impacto ambiental con respecto al causado por su vertido directo al medioambiente, y, por otra parte, generar biogás, que es una fuente de energía renovable capaz de suplir las necesidades de calor de la propia industria cárnica. En este trabajo se propone la construcción de una planta de DA anexa a un matadero de aves. La planta se alimenta con los residuos generados por dicho matadero y el biogás obtenido se quema en calderas para proporcionar calor de proceso, que es consumido por la propia industria (autoconsumo). Este proyecto pretende ser un ejemplo de generación distribuida y de economía verde.
• 16:15
Centrales termosolares Brayton híbridas: predicción termodinámica de eficiencias anuales y emisiones 30m
En este trabajo se realiza una simulación válida para plantas termosolares híbridas, de ciclo Brayton y de torre de concentración, desde un punto de vista termodinámico. Con este tipo de plantas de generación de energía eléctrica se pretende reducir el consumo de combustibles y la emisión de contaminantes, así como conseguir una potencia neta de salida estable. Estas plantas híbridas emplean dos fuentes principales de energía para su funcionamiento: la energía termosolar, proveniente de un campo de heliostatos que recoge y concentra la radiación solar recibida dirigiéndola hacia un colector solar y la energía que se origina en la oxidación de combustibles fósiles dentro de una cámara de combustión. La simulación incluye las principales pérdidas de energía que se producen en los diferentes subsistemas que componen la planta. Se presentan predicciones anuales para las eficiencias de la planta así como datos de consumo de combustible sobre la base de gas natural y emisiones. Los resultados numéricos se han obtenido con condiciones meteorológicas reales y sobre las dimensiones de una planta real de aproximadamente 4.5 MW.
Speaker: Ms. Rosa Merchán (University of Salamanca)
• 16:45
Coffee Break 30m
• 17:15
Caracterización térmica de muros en condiciones dinámicas utilizando termografías 30m
• 17:45
Optimal spatial distribution of solar and wind power plants over the Iberian Peninsula and complementary energy systems 30m
The introduction of massive renewable power in the energy system of a country needs to be treated carefully. Renewable energies (RE) such as solar and wind have an strong dependence on the meteorological conditions. This leads to a large temporal variance. Therefore there should be some other complementary systems to fit the energy production (EP) to the demand (ED). It is a challenge try to minimize the costs associated to the growth of renewable power systems. In this work we propose different possibilities to face this problem. The first approach consists of distributing solar and wind farms in a smart way, trying not only to get maximum capacity factor, but to minimize the temporal variance of the production respect to the energy demand. This problem has been already presented for the Iberian Peninsula at monthly time scales [1]. In this work we applied the same methodology at daily time scale. The method is applied to a database of solar and wind power potential generation constructed from the outputs of regional climate models runs (hindcast data) with a spatial resolution of 10km over the Iberian Peninsula. The quality of this data has been extensively proved [2] In spite of the strong reduction of the variance by applying this methodology, there still exists importat differences respect the energy demand . When RE is larger that ED the energy should be stored. In this work we only deal with pumped-storage hydroelectricity. The most storage we need the higher the associated costs will be. On the other hand if storage is insufficient some energy will be lost. When RE is smaller other systems should be switch on. If there is energy stored previously this should be used. If not, we need some extra energy power systems. Therefore it is necessary to reach a compromise between our RE installed power, pumped-storage capacity and extra systems in order to minimize the costs assciated. In this work we present an study of the configuration that the whole power system (electricity) should have in order to minimize costs and maximize the use of RE. This estimation has been obtained for the current (mean of last 5 years) ED in Spain and Portugal.
Speaker: Dr. Juan Pedro Montavez (Departamento de Física, Universidad de Murcia)
• 18:15
Impact of Future High-Variable Renewable Energy Mixes on 2030 Sustainability and Climate Change Goals 30m
This paper examines the present situation and evolution of the power mix and greenhouse gas emissions at global level to meet Sustainable Development Goals (SDGs) with a holistic model. We have performed a descriptive analysis of the latest trends. Based mainly on selected scenarios of high-VRES, to achieve desired targets, using a holistic model approach, our results identify the feasibility of selected target goals by 2030 at global and regional level. Results can provide key findings that policymakers, governments, and energy industries could benefit to achieve desirable Sustainability Development Goals.
• 18:45
Generando hidrógeno con agua y luz: Trisulfuros ternarios bidimensionales en celdas fotoelectroquímicas 30m
Speaker: Mr. Eduardo Flores (Dpto. de Física de Materiales M-04, Facultad de Ciencias, Universidad Autónoma de Madrid)
• 15:15 19:00
Magnetic Materials and Applications (CEMAG) Aula Química Analítica (Facultad Química (USC))

### Aula Química Analítica

• 15:15
Functionalized Hybrid Nanomagnets: New Materials for Innovations in Energy Storage and Medical Theranostics 45m
Imagine a future in which food is used to activate specific immune reactions in a human body based on an external noninvasive magnetic stimulus. Dream of a material that stores and releases energy reversibly by temperature changes between day and night. These visions may be realized by using magnetic nanoparticles that are functionalized to be biocompatible, environmentally stable and recyclable, self-healing, and low-cost. In this presentation I will discuss the basic concepts of magnetic nanomaterials and their magnetic properties with a focus on how to tune specific parameters in a controlled fashion to achieve the dreams of the future. I will highlight state-of-the-art experimental technologies that allow us to understand microscopic properties and interactions in relation to electronic structure changes caused by changes in size, shape, and composition of nanomaterials. Then I will discuss how this understanding is used when nanomagnets are functionalized for targeted drug delivery or composed to form macroscopic materials for new energetic applications like magnetic refrigeration. I will demonstrate that the seemingly complex behavior of hybrid metal/metal, metal/oxide, or oxide/oxide interface materials can be understood from the three fundamental interactions in magnetism: magnetic exchange interaction due to orbital overlap, spin-orbit interaction due to inner- and intra-atomic relativistic corrections (e.g., crystal field effects) and the long-range magnetic dipolar interaction. Several examples will be presented, including the formation of above-room-temperature ferromagnetic interface layers between low-temperature antiferromagnetic layers and the evolution of lattices of magnetic textures (skyrmions) in confined dimensions. The talk will end with an episode in the life of an imaginary golf-playing couple in the year 2040 who use their “Smart Magnet” (SMAG) phone to energize and heal their bodies on the green.
Speaker: Prof. Michael Farle (University of Duisburg-Essen, Germany, and Immanuel Kant Baltic Federal University, Russia)
• 16:00
ADVANCES IN MAGNETIC FORCE MICROSCOPY IMAGING: FROM PERMANENT MAGNETS TO BACTERIA 15m
Despite decades of advances in magnetic imaging, obtaining direct, quantitative information with high spatial resolution remains an outstanding challenge. The imaging technique most widely used for local characterization of magnetic nanostructures is the Magnetic Force Microscope (MFM), which is indeed a very active topic of investigation. Advantages of MFM include relatively high spatial resolution, simplicity in operation as well as sample preparation, and the capability to applied in situ magnetic fields to study magnetization process [1, 2]. Recently we have also demonstrate the possibility of operate in different environments including liquid media that allow us to investigate biological samples [3]. In the present work we try to approach some of the challenges of MFM, spatial resolution, sensitivity and quantitative measurements, by following different routes. One route is the development of high-performance MFM probes with sub-10 nm (sub-25 nm) topographic (magnetic) lateral resolution by following different easy and quick low-cost approaches. This allows one to not only customize the tip stray field, avoiding tip-induced changes in the sample magnetization, but also to optimize MFM imaging in vacuum (or liquid media) by choosing tips mounted on hard (or soft) cantilevers, a technology that is currently not available on the market [4]. In Figure 1 we show an example of the advantages of tune the mechanical properties of the cantilever. We compare the MFM images of a reference sample (a commercial high disk) acquired with a commercial MFM tip (Figure 1 a and b) and a custom-made probe (Figure 1 c and d) at ambient conditions and in liquid environment. It is well known that due to the viscosity of the liquid media there is a decrease in the quality factor of the cantilever and, for that reason, an increase of the noise in the MFM images. Using specific customized MFM probes we can enhance the signal in about a factor of 10 and improve significatively the quality of the images. Moreover, with this customized MFM probes we can obtain MFM images of biological materials in physiological conditions. In figure 2 we present the topography and the magnetic signal of magnetotactic bacteria Magnetospirillum gryphiswaldense [5] acquired with custom made MFM tips. Furthermore, the idea of explore new MFM probe architectures [6] allow us to focus some of the challenges of the technique as the lack of quantitative information. In that sense, alternative advanced methods as measuring energy dissipation with MFM is of great interest not only for nanomechanics but also to understand important energy transformation and loss mechanisms that determine the efficiency of energy of data storage device [7]. Acknowledgments We acknowledge the support from the Spanish Ministerio de Economia y Competitividad (MINECO) under projects no. MAT2013-48054-C2-1-R, Consolider CSD2010-00024, MAT2015-73775-JIN and MAT2016-76824-C3-1-R. References [1] M. Jaafar, L. Serrano-Ramón, O. Iglesias-Freire, A. Fernández-Pacheco, M.R. Ibarra, J.M. De Teresa, A. Asenjo, Nan. Res.Lett 6, 1 (2011) [2] E. Berganza, C. Bran, M. Jaafar, M. Vázquez, A. Asenjo, Sci. Rep. 6, 29702 (2016) [3]P. Ares, M. Jaafar, A. Gil, J. Gómez –Herrero, A. Asenjo, Small, 11, 4731–4736 (2015) [4] O. Iglesias – Freire, M. Jaafar, E. Berganz, A. Asenjo, Beilstein J. Nanotechnol. 7, 1068-1074 (2016) [5] A. M. Huízar-Félix, D. Muñoz, I. Orue, C. Magen, A. Ibarra, M. Barandiarán, A. Muela, M.L. Fernandez- Gubieda, Appl. Phys. Lett., 108, 6, 10.1063, (2016) [6] H. Campanella, M. Jaafar,J. Llobet, J. Esteve, M. Vázquez, A. Asenjo, R. P. del Real and J. A. Plaza, Nanotechnology, 22, 505301(2011) [7] M. Jaafar, O. Iglesias- Freire, P. García- Mochales, J.J. Saénz, A. Asenjo, Nanoscale 8, 16989-16994 (2016)
Speaker: Dr. Miriam Jaafar (Instituto de Ciencia de Materiales de Madrid)
• 16:15
Improved Performance of Assemblies of Magnetic Nanocrystals for Heat Delivery and Magnetic Guidance Applications 25m
Nanoparticles of magnetic materials are very useful in different bio-related applications, on which the combination of chemistry and magnetic performance will determine their final purpose. Two examples of magnetic nanoparticles synthesized and manipulated by wet-chemistry methods will be detailed to demonstrate how to exert control over the final magnetic behavior and over their ultimate functionalities, considering heat delivery or magnetic guidance of self-propelled swimmers.
• 16:55
Coffee Break 20m
• 17:15
Spin Hall effect in heavy metals: mechanisms and optimization 25m
The discovery of new spin-to-charge conversion effects (spin Hall effect (SHE), Rashba-Edelstein effect, spin-momentum locking) is expanding the potential of applications such as the magnetization switching of ferromagnetic elements for memories [1] or the recent proposal of a spin-orbit logic [2] which can have a strong technological impact. Finding routes to maximize the SHE is not possible as long as it remains unclear which is the dominant mechanism in a material. I will present a systematic study in Pt, the prototypical SHE material, using the spin absorption method in lateral spin valve devices. We find a single intrinsic spin Hall conductivity in a wide range of conductivities, in good agreement with theory. By tuning the conductivity, we observe for the first time the crossover between the moderately dirty and the superclean scaling regimes of the SHE, equivalent to that obtained for the anomalous Hall effect. Our results explain the dispersion of values in the literature and find a route to maximize this important effect [3]. We also studied the mechanisms in Ta, a material with a claimed giant SHE. Finally, I will show how to optimize the spin-to-charge current conversion at room temperature by combining Pt with a graphene channel [4], opening up exciting opportunities towards the implementation of spin-orbit-based logic circuits. [1] C. K. Safeer et al., Nat. Nanotech. 11, 143 (2016) [2] S. Manipatruni et al., arXiv:1512.05428 [3] E. Sagasta et al., Phys. Rev. B 94, 060412(R) (2016) [4] W. Yan et al., arXiv:1702.01971 (accepted in Nature Comms.)
Speaker: Prof. Felix Casanova (CIC nanoGUNE)
• 17:40
On the importance and estimation of local heat dissipation of interacting magnetic nanoparticles subjected to an applied magnetic field 15m
Controlling the heat dissipated by magnetic nanoparticles (MNPs) subjected to an alternating magnetic field HAC is crucial for the effectiveness of several applications such as heat-mediated drug delivery, which uses the heat generated by MNPs attached to some thermo-sensitive carrier to activate the release of the drug; or magnetic fluid hyperthermia (MFH), a promising technique for cancer treatment which uses the heat released by MNPs under AC fields to damage the cancer cells. Some experiments1,2,3 reported that during the exposure of MNPs to an AC field, the temperature may increase several tens of kelvins at the particle surface and then rapidly decay to zero only a few nanometers away. Therefore, addressing the local (at individual particle level) heat dissipation becomes very relevant4. In MFH, global (whole system) heat dissipation is usually obtained from the area of the magnetization vs. applied field M(H) hysteresis loops. However, using the same approach for local hysteresis cycles is not adequate for strong-interacting systems because coupled particles may have inverted hysteresis loops and therefore negative hysteresis areas. The aim of this work is to find an alternative way to evaluate local released energy. To do so, we work with the kinetic Monte Carlo technique, which is suitable to describe heating processes of interacting particle systems5. Our premise is that the hysteresis area of the entire system stands for the total dissipated energy. We developed an approach where we analyze the different types of jumps of the energies of individual particles and from there we are able recover the area of the entire system. This work was cofinanced by the Spanish MINECO (Project MAT2013-47078-C2-2-P), Xunta de Galicia, Spain (Project GRC 2014/013, ‘Programa de axudas á etapa predoutoral’ and financial support of D.S. under Plan I2C) and ‘Fondo Social Europeo 2014/2020’.
Speaker: Ms. Cristina Munoz-Menendez (Instituto de Investigacións Tecnolóxicas and Departamento de Física Aplicada, Universidade de Santiago de Compostela, Spain)
• 17:55
Motion of magnetic textured controlled by temperature gradients and acoustic waves 25m
Speaker: Dr. Rocio Yanes (Universidad de Salamanca)
• 18:20
Chiral Organic Molecules for Molecular Spintronics Applications 15m
Chiral molecules are fascinating objects lying behind some deep, still unexplained puzzles of Nature such as the fundamental asymmetry found in living beings, which only utilize molecules with a specific helicity, called enantiomers. The relationship between chirality and magnetism has long puzzled researchers. Recently, layers of purely organic chiral molecules have been shown to scatter electrons differently depending on their spin [1] or to induce the appearance of strong spin polarization in initially unpolarized electron currents [2], opening up the possibility to use these materials as spin filters or to control enantioselective reactions by means of spin polarization. In this work we report on an experimental study of different spin-related phenomena observed in layers of chiral molecules adsorbed on single-crystal metal surfaces. Monolayer-thick films of chiral 1,2-diphenyl-1,2-ethanediol (DPED) have been studied by means of spin-polarized, angle-resolved photoemission (SPARUPS) at the MAX-lab synchrotron in Lund, Sweden [3]. This molecule has two chiral centers located at the two carbon atoms of the ethane chain and presents two chiral enantiomers which are designated according to their conformation and optical activity as (R,R)-(+)-DPED and (S,S)-(–)-DPED. The molecular layers were adsorbed in ultra-high vacuum on top of ferromagnetic Co films epitaxially grown on Cu(100) whose in-plane spin polarization served as an in situ reference. The photoelectons emitted through adsorbed layers of both chiral enantiomers display a clear spin polarization at room temperature, independent of their binding energy. Nevertheless, as Figure 1 shows, the spins point along different directions in space: in-plane for (R,R)-(+)-DPED and out-of-plane for (S,S)-(–)-DPED, which makes the DPED molecule a prototype system to study enantioselective spin filtering. These results will be compared to other recent experiments carried out on a similar molecule, 1,2-diphenylethylenediamine, adsorbed on Cu(100), highlighting the importance of the substrate and the charge transfer between this matter and the adsorbate. One of the main characteristics of chiral molecules is their optical activity, that has long been known and studied for the visible and UV wavelengths but not so much in the x ray range. Enantio-pure ultrathin films of DPED adsorbed on Cu(100) at 100 K have also been studied at MAXlab using circularly polarized x rays absorption (XAS) at the carbon K edge. XAS excites element-specific core electrons to empty levels in the ground state thus probing the molecule's electronic configuration. Pairs of spectra with circularly polarized x rays of opposite helicity were acquired and compared by taking their intensity ratio. Several clearly dichroic features have been observed (see Figure 2) and assigned to transitions into empty C–C and C–H π-type molecular orbitals; as expected, these dichroic ratios show opposite signs for the two enantiomers studied. However, the magnitude of the asymmetry measured is much larger than expected for the natural circular dichroism associated to the chiral configuration of the molecule. Preliminary analysis of these data indicates that the charge transfer between the Cu(100) substrate and the DPED molecules upon adsorption might be enantio-selective and strongly polarized in orbital moment. The results described above suggest that this type of compounds may be useful for molecular spintronics applications.
• 18:35
Magnets solve problems 25m
Speaker: Dr. Xavi Marti (Chief Technological Officer IGSresearch | Permanent researcher at Institute of Physics of the Czech Academy of Sciences)
• 15:15 19:00
Molecular Electronics Aula Matemáticas (Facultad Química (USC))

### Aula Matemáticas

• 15:15
Spin transport, spinterface and spin photovoltaics in molecular films 30m
Spin injection and transport into molecular semiconductors has attracted great interest recently, especially due to the small sources of spin decoherence in these materials [1]. However, there are still many open questions in this nascent field which range from the actual spin polarization at metal/molecular interfaces to the integration of molecular functionalities into spintronic devices. In this talk I will review several experimental highlights from our group. By using bathocuproine (BCP) and fluorinated copper phthalocyanine (FCuPc) we have unambiguously proved that spin transport occurs via molecular levels, finally dismissing any eventual role of metallic filaments or defects in the electronic transport [2,3]. Our experiments point to the critical role of the interfacial barriers for carrier injection into the molecular levels. Moreover, in the FCuPc case we have shown concomitant spin transport and photoresponse. Thanks to the emergence of two molecular-based properties, four distinguishable resistance states adjustable by light and/or magnetic field can be configured in a simple 2-bit memory cell [3]. Further recent results in this wide topic, merging spin transport with the photovoltaic effect of C60 fullerenes will be shown [4]. I also will present spin valves based on rare-earth quinolines. Here we highlight the role of metal/molecular hybridization in the spin polarization and its possible control [5-7].
Speaker: Prof. Luis Hueso (CIC nanoGUNE)
• 15:45
Bioengineering a Single-Protein Wire 25m
Biological Electron Transfer (ET) is the key step in many basic cellular processes such as respiration and photosynthesis [1]. Nature has developed highly specialized molecular building blocks capable of transporting charge with unprecedented efficiency, i.e. fast and at long distances [2]. Understanding the mechanisms behind biological ET is key to elucidate the changes in the charge transport regime caused by specific structural variations of the associated molecular machinery, which ultimately lead to, for instance, malfunctioning of the mitochondria. Fundamental knowledge gained from studying biological ET can also be exploited to design bioelectronic devices. Such studies would ultimately unveil what are the key parameters to be controlled in the transduction of electrical signals from active biomolecules, and direct us to the design of the next generation of highly specific optoelectronic sensors [3]. In order to comply with the downsizing demands of the microelectronics industry, the latest bioelectronic advances focus on bottom-up perspectives [3], aiming for maximum sensitivities, high signal-to-noise ratios and enhanced efficiency in order to reduce energy consumption. Model redox proteins have been integrated in nano/micro-scale devices as the charge transport material. Cu-Azurin conductance signatures have been recently observed in microscale solid-state devices [4-6], which demonstrates their compatibility when hybridized to an electronic platform. Furthermore, Cu-Azurin and cytochrome b562 have also been extensively analysed at the single-protein level [7,8]. These pioneering studies established the sequential two-step ET tunneling mechanism for such systems26, and demonstrated the feasibility of such hybrid bio-interfaces to work as active components in nanoscale circuits. Here [9] we present an example of bioengineering charge transport in a single-protein wire. The copper-binding protein Azurin has been exploited to compare charge transport of single-protein devices made of a wild-type (Wt) structure and a mutant (K41C), where, in the latter, the natural lysine (Lys) 41 residue has been replaced by a cysteine (Cys) (Fig. 1a). This single point mutation has a two-fold effect; first, the new solvent-exposed thiol (-SH) group will serve as a new chemical connection to one of the external device terminals, and second, the modification is in the secondary coordination sphere of the Cu centre, which is expected to influence the metal redox behavior [10,11] and, hence, the transport regime through the protein matrix. Individual proteins of both variants were trapped between two metal electrodes in a physiological environment using an Electrochemical Scanning Tunneling Microscope (EC-STM) configuration, and the charge transport characterized as a function of an applied electrochemical gate voltage and temperature [12,13]. All-atom molecular-dynamics (MD) simulations suggest that the electrode-protein-electrode junction occurs via two well-localized sites on the protein, i.e. the hydrophobic patch and the natural Cys residues. Despite comparable orientations of both Wt and K41C proteins bridges are expected, the results show acute differences in the charge transport mechanism of the single-protein wire between the Wt and the mutant variant, observing in the latter a complete shutdown of the two-step sequential tunneling character typically described in the Wt [26]. Ab initio calculations of the relevant ET pathway fragment including the modified residue 41 show the poor participation of the Cu centre in the transport-relevant molecular frontier orbital of the K41C mutant. These results fully account for the observed conduction changes within the framework of coherent tunneling mechanism for the single-protein wire of bioengineered proteins. [1] E. Broda, The Evolution of the Bioenergetic Processes. (Elsevier, 2014). [2] H. B. Gray & J. R. Winkler, Proc. Natl. Acad. Sci. U. S. A. 102 (2005) 3534-9. [3] A. Zhang & C. M. Lieber, Chem. Rev. 116 (2015) 215-257. [4] L. Sepunaru, I. Pecht, M. Sheves, & D. Cahen, J. Am. Chem. Soc. 133 (2011) 2421-3. [5] W. Li et al., ACS Nano 6 (2012) 10816-24. [6] X. Yu et al., ACS Nano 9 (2015) 9955-9963. [7] Q. Chi, O. Farver & J. Ulstrup, Proc. Natl. Acad. Sci. U. S. A. 102 (2005) 16203-16208. [8] E. Pia et al., Nano Lett. 11 (2011) 176-82. [9] M. P. Ruiz et al., submitted to Nature Materials (2017). [10] N. M. Marshall et al., Nature 462 (2009) 113-6. [11] K. M. Lancaster et al., J. Am. Chem. Soc. 132 (2010) 14590-5. [12] I. Díez-Pérez et al., Nat. Chem. 1 (2009) 635-41. [13] A. C. Aragonès et al., Nature 531 (2016) 88-91.
• 16:10
Electron transport through individual all-organic polyradicals 30m
Speaker: Dr. Enrique Burzuri (Imdea Nanociencia)
• 16:40
Theoretical evaluation of [V(α-C3S5)3]2- as a nuclear-spin sensitive single-molecule spin transistor. 25m
In a straightforward application of molecular nanospintronics to quantum computing, single-molecule spin transistors can be used to measure and control nuclear spin qubits, since a conductance jump occurs when the electronic spin inverts its polarization, and this happens at a specific magnetic field determined by the nuclear spin state. So far, this procedure has only been studied using TbPc2, the first known Single Ion Magnet. Here we theoretically explore the adequacy for this procedure of the highly stable molecular spin qubit [V(α-C3S5)3]2-. We determine the spin-dependent conductance and verify that, at the Fermi energy, the intrinsic electronic spin does not share spatial density distribution with the polarized current electrons, indicating that the spin states may survive in the conduction regime. We estimate some physical parameters to guide the experiments, and verify the robustness of the theoretical methodology by applying it to two chemically related vanadium complexes.
Speaker: Dr. Salvador Cardona-Serra (Instituto de Ciencia Molecular)
• 17:05
Coffee Break 55m
• 18:00
Last advances on thin film organic lasers. 30m
In the last years extensive research has been devoted to the investigation of optically-pumped solution processable thin film organic lasers, due to their advantages of chemical versatility, wavelength tunability, mechanical flexibility and low cost. Particularly attractive for applications in the fields of optical communications, biosensing and chemical sensing are distributed feedback (DFB) lasers, consisting of nanostructured active organic waveguides. In this context, our research group has performed extensive work on DFBs with different types of organic active materials and laser resonators. In this presentation the last advances achieved by our research group in improving both, the active laser material and the laser resonator, and their application as optical sensors of various kinds, will be discussed. This includes first, results on high performing laser dyes of two families: perylenediimides, PDIs, and carbon-bridged oligo(p-phenylenevinylene)s, COPVs, dispersed in thermoplastic polymer films, emitting in a wide range of wavelengths within the visible spectrum. Secondly, progress on the development of different device geometries based on one dimensional second-order DFB resonators fabricated by holographic lithography and nanoimprint lithography. The capability of these lasers to be used as label-free refractive index sensors, sensors for the specific detection of biomolecules of clinical interest, etc., will also be described.
Speaker: Prof. María Ángeles Díaz García (Universidad de Alicante)
• 18:30
Modulating light emission in a spin-OLED through spin injection at high voltages 30m
Spin-based electronics is one of the emerging branches in today’s nanotechnology and the most active area within nanomagnetism. So far spintronics has been based on conventional materials like inorganic metals and semiconductors. Still, an appealing possibility is that of using molecule-based materials, as components of new spintronic systems. In particular, by taking advantage of a hybrid approach one can integrate molecular materials showing multifunctional properties into spintronic devices. In this talk we illustrate the use of this approach to fabricate multifunctional molecular devices combining light and spin-valve properties (i.e., Spin-OLEDs).
Speaker: Dr. Helena Prima Garcia (Instituto de Ciencia Molecular (Valencia))
• 15:15 18:45
Particle and Theoretical Physics I Aula Química Técnica (Facultad de Química (USC))

### Aula Química Técnica

• 15:15
Radiative b-baryons decays at LHCb 30m
Este análisis consiste en el estudio de las desintegraciones de bariones pesados con un quark b (Lambda_b, Xi_b y Omega_b ) con un fotón en el estado final. Esto tiene un doble interés: - Las desintegraciones radiativas de bariones pesados no han sido observadas. Se pretende medir la fracción de desintegraciones de los canales antes mencionados. - El Modelo Estándar (ME) predice que en las desintegraciones raras del tipo b->s gamma el fotón tiene polarización levógira, y cualquier desviación al respecto implicaría la existencia de Nueva Física. Motivado por esto, se usará la distribución angular de los canales mencionados para extraer la polarización del fotón en este tipo de desintegraciones. Para este último punto se discutirán las sensibilidad esperadas debido a los efectos del detector LHCb.
Speaker: Luis Miguel García (IFIC)
• 15:45
Weak-lensing magnification as a probe for the dark Universe 30m
Introduction Cosmological measurements show that the expansion of the Universe is accelerating. Generically, the entity that causes this acceleration (whether it is a new form of matter or modified gravity) is called dark energy [1]. Nevertheless, the nature of dark energy constitutes one of the biggest puzzles in Physics. Shedding light on dark energy requires the construction of big experiments that survey large volumes of the Universe. One of those experiments is The Dark Energy Survey (DES) [2]. One of the observational probes that may unravel the nature of dark energy is the weak gravitational lensing [3]. Weak-lensing is produced by the gravitational bending of the trajectory of photons by gravitational fields leading to the deflection of the light rays. Thus, the light emitted by foreground distant galaxies is deflected by the matter located between them and the observer. For extended sources, in addition to the change in position, this leads to two observational effects: an isotropic size enlargement (magnification) and an elongation/shrink along one axis (shear). Since the surface brightness is preserved, the isotropic size enlargement due to magnification produces an increase on the observed flux of the background galaxies. This allows to see galaxies that would be beyond the detection threshold if gravitational lensing was not present. Thus, nearby the lenses the observed density of sources is increased. This effect is known as number-count magnification and allows to probe the convergence profile of the lens sample selected, that is a proxy for the matter profile [4]. Weak-lensing magnification by voids Extensive wide-field programs have allowed accurate measurement of weak lensing effects. Previous magnification measurements involve the use of very massive objects as lenses, such as luminous red galaxies (LRGs) and clusters [5], or high redshift objects as sources, such as Lymanbreak galaxies (LBGs) or quasars (QSOs) [6,7]. Lyman break galaxies and quasars have demonstrated to be a very effective population of background samples to do magnification studies due to its high lensing efficiency. However, deep surveys or large areas are needed to reach a significant amount of these objects. Thus, shallow or small area surveys require the selection of a more numerous population of source galaxies to allow the measurement of the magnification signal. A new technique has been developed at the Dark Energy Survey [8], where galaxies selected only by its photo-z, are used both as lenses and sources. This procedure simplifies the analysis as no additional processing is needed to construct the sample (contrary to the methodology present on the literature). This new methodology allows the detection of the magnification signal on small area surveys, such as the DES Science Verification data-set, but the power of this methodology also applies to large area surveys such as LSST or the final footprint of DES, with 5000 deg^2 . The huge decrease on the shot-noise due to the increase on the surface density of sources, allows the selection of more exotic lenses, such as voids. Voids are the emptiest regions of the cosmic web that conform the large-scale-structure of the Universe (LSS) [9]. Thus, their structure and evolution is dominated by dark energy. Previous works on simulations show that different void properties such as their ellipticity or its total matter radial distribution (void-profile) is strongly dependent on the modified gravity model used [10-17]. Due to the presence of dark matter, the total matter distribution is only accessible through gravitational lensing. Thus, the determination of the void-profile with weak-lensing magnification constitutes a new and independent probe for dark energy. References [1] S. Perlmutter et al., ApJ 517 (1999) 565. [2] The Dark Energy Survey Collaboration, ArXiv astro-ph/0510346 (2005). [3] D. H. Weinberg et al., Phys. Rep. 530.2 (2013) 87. [4] M. Bartelmann and P. Schneider, Phys. Rep. 340 (2001) 291. [5] A. H. Bauer et al., MNRAS 440 (2014) 3701. [6] Ryan Scranton et al., ApJ 633.2 (2005) 589. [7] C. B. Morrison et al., MNRAS 426 (2012). [8] M. Garcia-Fernandez et al., ArXiv 1611.10326 (2016). [9] A. Kovács and J. García-Bellido., MNRAS 462 (2016), [10] F. von Braun-Bates et al., JCAP 3 (2017) 012. [11] G. Lavaux and B. D. Wandelt., MNRAS 403 ( 2010) 1392. [12] G. Lavaux and B. D. Wandelt., ApJ 754.2 (2012) 109. [13] D. Spolyar, M. Sahlén, and J. Silk., Phys. Rev. Lett. 111.24 (2013) 241103. [14] E. V. Arbuzova, A. D. Dolgov, and L. Reverberi., Astroparticle Physics 54 (2014) 44. [15] Y.-C. Cai, N. Padilla, and B. Li. ArXiv 1410.8355 (2014). [16] P. Zivick et al., MNRAS 451 (Aug. 2015) 4215. [17] A. Barreira et al., JCAP 8, (2015) 028.
Speaker: Mr. Manuel Garcia-Fernandez (CIEMAT)
• 16:15
Medida del ángulo de mezcla theta13 en el experimento Double Chooz 30m
El objetivo principal del experimento Double Chooz es conseguir una medida precisa del ángulo de mezcla de neutrinos theta13. Este parámetro, el más pequeño de los tres ángulos de mezcla conocidos, se puede determinar a partir de la desaparición de los antineutrinos electrónicos emitidos por los dos reactores de la central nuclear de Chooz, en Francia. Dichos antineutrinos interaccionan con los protones presentes en el líquido centelleador de los detectores mediante la desintegración beta inversa, produciendo la coincidencia temporal y espacial de dos señales que permiten una sustracción eficiente de los fondos del experimento. En este documento se presentan los últimos resultados obtenidos a partir de un análisis novedoso, que proporcionan la medida más precisa de theta13 conseguida por Double Chooz hasta la fecha.
Speaker: Ms. Diana Navas Nicolás (Ciemat)
• 16:45
Search for new physics via baryon EDM at LHC 30m
Permanent electric dipole moments (EDMs) of fundamental particles provide powerful probes for physics beyond the Standard Model. We propose to search for the EDM of strange and charm baryons at LHC, extending the ongoing experimental program on the neutron, muon, atoms, molecules and light nuclei. The EDM of strange Λ baryons, selected from weak decays of charm baryons produced in pp collisions at LHC, can be determined by studying the spin precession in the magnetic field of the detector tracking system. A test of CPT symmetry can be performed by measuring the magnetic dipole moment of Λ and anti-Λ baryons. For short-lived Λ+c and Ξc+ baryons, to be produced in a fixed-target experiment using the 7 TeV LHC beam and channeled in a bent crystal, the spin precession is induced by the intense electromagnetic field between crystal atomic planes. The experimental layout based on the LHCb detector and the expected sensitivities in the coming years are discussed, along with perspectives for the future.
Speaker: Joan Ruiz Vidal (IFIC, University of Valencia - CSIC)
• 17:15
Challenging the Standard Model with top quarks interactions 30m
The elementary particles, their properties and their interactions are described by the Standard Model (SM), which is the theoretical framework for the study of the strong interactions of quarks and gluons and the unified electroweak force by means of a modelling framework based on local gauge invariance. The SM is very successful in accounting for most of the observed phenomena at the microscopic frontier of physics, verified and tested in many experiments in the last decades, also including the discovery of the Higgs boson by the ATLAS and CMS experiments at the LHC facility at CERN laboratory in 2012. However, new theories beyond the SM are still needed to explain many pending questions in physics: the matter-antimatter asymmetry, the pattern of flavour mixings and fermion masses, the nature of dark matter or the accelerated expansion of the Universe. The SM accommodates the measured masses, but it does not explain the vastly different mass scales spanned by the known particles. The dynamics of flavour and the origin of CP violation are also related to the mass generation, but still not fully understood. The SM should be either extended or replaced by a more general modelling framework, but experimental evidences are needed to point in which direction the SM should be modified. The top quark is a very sensitive probe of the electroweak symmetry breaking, since it is the heaviest fundamental particle with the SM framework.Its large mass makes the top very different from all other quarks, with a Yukawa coupling to the Higgs boson close to unity. For these reasons the top quark and the Higgs boson play very special roles in the SM and in many extensions thereof. An accurate knowledge of their properties (mass, couplings, production cross section, decay branching ratios) can bring key information on fundamental interactions at the electroweak breaking scale and beyond. Some of the top quark couplings were investigated at the Tevatron, while others, such as the coupling of the top quark to the Z or the Higgs boson are becoming accessible only with the high-statistics top quark sample at the LHC. This contribution provides a comprehensive overview of the latest ATLAS results for tt+Z/W and tt+H processes.
Speaker: Dr. Maria Moreno Llacer (CERN)
• 17:45
Does a deformation of special relativity imply energy dependent photon time delays? 30m
We analyze the observability of an energy dependence, due to departures from special relativity, in delays of arrival times of particles produced by very distant sources. We find different conclusions depending on the model used for the source and the model used for the departures from special relativity both in the case of Lorentz invariance violations and in the case of a modification compatible with the relativity principle.
Speaker: Mr. Javier Relancio (Universidad de Zaragoza)
• 18:15
Sincronización fina del trigger de las cámaras de tubos de deriva para el detector CMS del LHC 30m
En la presente contribución se describe el trabajo de sincronización fina del sistema de disparo de las cámaras de deriva del detector CMS del LHC. Este estudio se ha realizado después de la actualización del sistema de disparo de las cámaras de deriva que ha tenido lugar a principios de 2016. La obtención de las correcciones en los retrasos de la señal de reloj que debe aplicarse a la electrónica de cada cámara es fundamental para el optimo funcionamiento del detector, pues estas correcciones optimizan la eficiencia del sistema de disparo. En la presente contribución se describe el método y los resultados obtenidos.
• 15:15 19:00
Physics of the Atmosphere and the Ocean Química Inorgánica (Facultad Química (USC))

### Química Inorgánica

• 15:15
Variabilidad de las propiedades físicas y su influencia en el ecosistema de la plataforma continental de A Coruña. 15m
Análisis de la variabilidad espacial y temporal de la temperatura y la salinidad a partir de las series históricas obtenidas con una periodicidad mensual en el transecto de A Coruña del proyecto RADIALES del Instituto Español de Oceanografía (IEO).
Speaker: Ms. Lucía Lado (Instituto Español de Oceanografía (IEO))
• 15:30
The Santander Atlantic Time Series Station (SATS): Una serie de tiempo combinación de una estación hidrográfica mensual y el Observatorio Oceánico Biscay AGL 15m
Speaker: Dr. ALICIA LAVIN MONTERO (INSTITUTO ESPAÑOL DE OCEANOGRAFIA)
• 15:45
De antiguos libros a recrear el método: El método de Schönbein para medir ozono 15m
Speaker: Mr. Ignacio A. Ramírez-González (EPhysLab, Universidade de Vigo)
• 16:00
• 16:15
A high-resolution picture of Euro-Atlantic climate variability during the Late Maunder Minimum 15m
The Late Maunder Minimum (LMM, 1685-1715) denotes the climax of the Little Ice Age (LIA, cf. 1400-1700), which was one of the coldest periods in the last millennium. The LMM is a period of great interest since it was one of the few cold periods in recent centuries that persisted for several decades. Here, we present the first direct instrumental evidence of the daily atmospheric circulation over the eastern Atlantic during the LMM based on wind direction observations taken aboard ships over the English Channel. To do so, we derived two sets of monthly atmospheric circulation indices based on the persistence of the wind direction in the four cardinal directions and in 8-point wind roses for the 1685-2014 period. They provide the longest observational records of the atmospheric circulation to date, allowing us to explore the variability of the atmospheric circulation in a wide range of time-scales. The analysis of these indices indicate that the LMM was characterized by a pronounced meridional circulation and a marked reduction in the frequency of westerlies all year round, as compared to the present (1981-2010). The winter circulation contributed the most to enhance the cold conditions through an overall increase of northerly winds. Nevertheless, our findings also show a LMM more heterogeneous than previously thought, displaying contrasting spatial patterns in circulation and temperature, as well as large decadal variability. Based on the circulation characteristic of each winter, we provide a new observational-based catalogue of winters for the LMM, reassessing the indirect evidences available in the literature about the temperature conditions of the LMM. Our assessment confirms the majority of extremely cold winters documented in the literature, but also uncovers the existence of additional undocumented cold winters and a substantial number of mild winters that had been unnoticed so far. The outcomes also suggest a non-stationarity of the North Atlantic Oscillation (NAO) pattern within the LMM, which has not been reported before, with extremely cold (moderate) winters being associated to negative phases of a “high-zonal” (“low-zonal”) NAO pattern.
Speakers: David Barriopedro (Instituto de Geociencias (IGEO, CSIC-UCM)), Javier Mellado (University of Lisbon, CGUL, IDL, Lisbon, Portugal)
• 16:30
La nueva versión del “número de manchas solares”: consecuencias para las ciencias atmosféricas 15m
• 16:45
El proyecto INCITE: Historia de los monzones antes del siglo XX 15m
Speaker: Dr. Gallego David (Universidad Pablo de Olavide)
• 17:00
Caracterización de los vientos en Extremadura: un estudio preliminar 15m
• 17:15
Coffee Break 15m
• 17:30
Impacto de eventos extremos de pluviosidad en la producción hidroeléctrica en la cuenca Miño-Sil 15m
En este estudio veremos como afecta el cambio climático a la pluviosidad y a su vez a la producción de energía eléctrica en la cuenca Miño-Sil
Speaker: Mr. Manuel Fernández González (EphysLab, Universidade de Vigo)
• 17:45
Strong signatures of high-latitude blocks and subtropical ridges in winter PM10 in Europe 15m
• 18:00
Estudio de la reproducibilidad computacional del CMIP5 15m
Trabajo fin de máster que consiste en el estudio de la reproducibilidad computacional de los modelos climáticos que forman parte del CMIP5.
Speaker: Mr. Michael García (EPhysLab, Universidade de Vigo)
• 18:15
Validación de la precipitación en modelos: protocolos y notas metodológicas 15m
Speaker: Dr. Francisco J. Tapiador (UCLM)
• 18:30
Carroussel de Posters 30m
• 15:15 19:05
Quantum Information Aula Química General (Facultad Química (USC))

### Aula Química General

• 15:15
Testing fundamentaly binary theories 25m
Fundamentally binary theories are non-signaling general probabilistic theories in which measurements with many outcomes can always be constructed by selecting from measurements with two outcomes. We show that, for any n, there are quantum correlations between n-outcome measurements which cannot be explained by fundamentally (n-1)-ary theories. Interestingly, even fundamentally binary theories have never been directly falsified by any experiment. Here we report some current theoretical and experimental efforts for falsifying them.
Speaker: Prof. Adán Cabello (University of Seville)
• 15:40
Exact Quantum Change Point Detection 25m
Sudden changes are ubiquitous in nature. Identifying them is crucial for a number of applications in biology, medicine, and social sciences. Here we take the problem of detecting sudden changes to the quantum domain. We consider a source that emits quantum particles in a default state, until a point where a mutation occurs that causes the source to switch to another state. The problem is then to find out where the change occurred. We determine the maximum probability of correctly identifying the change point, allowing for collective measurements on the whole sequence of particles emitted by the source. Then, we devise online strategies where the particles are measured individually and an answer is provided as soon as a new particle is received. We show that these online strategies substantially underperform the optimal quantum measurement, indicating that quantum sudden changes, although happening locally, are better detected globally.
Speaker: Dr. Gael Sentis (Naturwissenschaftlich-Technische Fakultät, Universität Siegen, 57068 Siegen, Germany)
• 16:05
Entanglement harvesting: entangling systems via local operations 25m
The abstract contains the overview of the talk that is proposed, as well as an introduction to the subject of matter and the presenter's contributions to the field.
Speaker: Mr. Alejandro Pozas-Kerstjens (ICFO)
• 16:30
Self-testing of multipartite quantum states 25m
A very timely enterprise nowadays is to understand which states can be self-tested and how. This question has been answered recently in the bipartite case, while it is largely unexplored in the multipartite case, with only a few scattered results, using a variety of different methods: maximal violation of a corresponding Bell inequality, numerical SWAP method, stabilizer self-testing etc. This also explains why it is not clear which states can be self-tested. In our work, we propose a unifying approach: combining projections to two-qubit spaces (projecting parties or degrees of freedom) and then using the maximal violation of tilted CHSH inequalities. In the qubit case, using this simple but general approach, we show that almost all multipartite qubit states can be self-tested (albeit with many measurements), namely all the ones that can be written with all real coefficients in some basis. In particular, this result is enough to characterize the tripartite case completely. Moreover, for special classes of multipartite states, like symmetric Dicke states and graph states, our approach yields a self-test with few measurements. Finally, for the qudit case, we show that all multipartite states which admit a Schmidt decomposition can be self-tested with few measurements
Speaker: Mr. Ivan Supic (ICFO - Institut de Ciencies Fotoniques)
• 16:55
Coffee break 30m
• 17:25
Device-independent quantum key distribution with single-photon sources 25m
This abstract describes a new scheme for Device Independent Quantum Key Distribution, a minimalist form of quantum cryptography in which no modeling is made about the internal working of the devices used. The scheme is appealing as it relies on single-photon sources, a new-generation technology whose development has boosted lately. When physical imperfections are taken into account, our scheme largely outperforms all previous proposals, opening in this manner a promising avenue for experimental DIQKD implementations. This abstract is suited for a talk at the Quantum Information symposium.
Speaker: Mr. Alejandro Mattar (ICFO - The Institute of Photonic Sciences)
• 17:50
Performance evaluation of device-independent quantum key distribution with practical sources 25m
Device-independent quantum key distribution aims to provide users with information-theoretically secure secret keys without any need for characterizing the physical devices. Nevertheless, there still exists a big gap between theory and experiments. In this work, we evaluate the performance of assisted device independent quantum key distribution in a realistic scenario, that is, using practical photonic sources and a finite number of signals exchanged between the two parties. For this task, we employ recently derived finite key rate formulas against general attacks. Our results are useful to analyze the feasibility of practical device-independent quantum key distribution.
Speaker: Mr. Víctor Zapatero (EI Telecomunicación, Departamento de Teoría de la Señal y Comunicaciones, Universidad de Vigo, Vigo E-36310, Spain)
• 18:15
Classical physics and the bounds of quantum correlations 25m
The particular set of numerical bounds satisfied by quantum correlations has been intensively studied as a plausible gateway to the first principles of quantum theory, which up to date remain elusive. Here we show that these bounds are indeed not exclusive to quantum theory: for any abstract correlation scenario with compatible measurements, models built on classical waves produce events with probability distributions indistinguishable from those of quantum theory and, therefore, share the same bounds. We demonstrate this finding by implementing classical microwaves that propagate along meter-size transmission-line circuits and reproduce the probabilities of three emblematic quantum experiments [1]. Our results show that the "quantum" bounds would also occur in a classical universe without quanta, where classical fields would be the fundamental physical objects. The implications of this observation will be discussed [2]. [1] D. Frustaglia, J. P. Baltanás, M. C. Velázquez-Ahumada, A. Fernández-Prieto, A. Lujambio, V. Losada, M. J. Freire, and A. Cabello, Phys. Rev. Lett. 116, 250404 (2016). [2] L. Zyga, 'Quantum' bounds not so quantum after all, Phys.org (July 1st, 2016), https://phys.org/news/2016-07-quantum-bounds.html.
Speaker: Prof. Diego Frustaglia (Universidad de Sevilla)
• 18:40
Relativistic physics and beyond with superconducting circuits 25m
We will discuss several schemes for simulating relativistic motion in superconducting circuit architectures. As a first example, we show how the dynamical modulation of the qubit-field coupling strength in a circuit quantum electrodynamics architecture mimics the motion of the qubit at relativistic speeds. This allows us to propose a realistic experiment to detect microwave photons coming from simulated acceleration radiation [1]. We show that this accelerated radiation can be used to generate entanglement between a pair of qubits [2]. Moreover, we discuss the effects of relativistic motion on single-atom and two-atom Dicke superradiance [2]. Finally, we show that it is possible to simulate effective velocities which even exceed the speed of light in the medium, giving rise to the quantum counterpart of Cerenkov radiation, namely Ginzburg radiation [3]. We propose as well an implementation of a twin-paradox scenario in superconducting circuits, with velocities as large as a few percent of the speed of light [4]. Ultrafast modulation of the boundary conditions for the electromagnetic field in a microwave cavity simulates a clock moving at relativistic speeds. Since our cavity has a finite length, the setup allows us to investigate the role of clock size as well as interesting quantum effects on time dilation. In particular, our theoretical results show that the time dilation increases for larger cavity lengths and is shifted due to quantum particle creation. The combination of both techniques generates a toolbox for studying relativistic phenomena in quantum field theory with superconducting circuits. We will discuss some possible future applications.
Speaker: Dr. Carlos Sabín (Instituto de Física Fundamental, CSIC)
• 15:15 20:30
Thermodynamics Aula Químca Orgánica (Facultad Química (USC))

### Aula Químca Orgánica

• 15:15
On the need of Force Field parametrization for a correct description of the host-guest interactions in supramolecular structures that capture and storage CO2 15m
Speaker: Mr. Ángel Vidal Vidal (University of Vigo)
• 15:30
Determinación de las propiedades interfaciales líquido-líquido de una mezcla de agua + alcoholes mediante simulación computacional 15m
• 15:45
Thermodynamic stability of the size distribution of charged metal nanoparticles 15m
Ligand-stabilized metal nanoparticles (NPs) have become essential in many active areas of research. A narrow size distribution is essential for controlling their physicochemical properties and for increasing the degree of ordering in NP superlattices. During NP synthesis, coalescence and Ostwald ripening induce polydispersity. Digestive ripening (DR) is a widely-used, post-synthetic step that reduces the dispersity and produces narrow size distributions of ligand-stabilized NPs of noble metals, transition metals, metal sulfides and halides, II-VI semiconductors, lanthanide oxides, as well as alloys and core-shell bimetallic NPs. DR involves heating the as-prepared, polydisperse colloidal solution in the presence of excess strong capping ligand at or near the boiling point of the solvent under reflux. A ligand-exchange reaction induces the redistribution of atoms among NPs and leads to a narrow size distribution. In spite of the experimental efforts to provide insights, the mechanisms of DR are not yet known. We present a DR theory that clarifies the factors that determine the size distribution of charged NPs.
Speaker: Prof. Jose A. Manzanares (Universidad de Valencia)
• 16:00
Estudio de las propiedades interfaciales y equilibrio de fases de la mezcla binaria THF+CO2 mediante dinámica molecular 15m
Speaker: Mr. Algaba Jesús (Laboratorio de Simulación Molecular y Química Computacional, CIQSO-Centro de Investigación en Química Sostenible y Departamento de Ciencias Integradas, Universidad de Huelva)
• 16:15
El papel de las interacciones moleculares en la descripción del equilibrio de fases de los hidratos de CH4 y CO2 15m
Speaker: Mr. Jose Manuel Miguez Diaz (Universidad de Huelva)
• 16:30
Simulación molecular de hidratos de metano en condiciones oceánicas 15m
Los de hidratos de gas (o clatratos de agua) son compuestos de inclusión no estequiométricos constituidos por agua y pequeñas moléculas de gas. Aparecen a bajas temperaturas y presiones moderadamente altas, y están presentes de forma natural principalmente en los fondos oceánicos y el permafrost de las regiones frías [1]. Existen además, evidencias de la presencia de hidratos en cometas y otros cuerpos del sistema solar, especialmente en los planetas exteriores y sus lunas [2], y¬ se considera que abundan en numerosos lugares del universo fuera del sistema solar. Una de las aplicaciones más interesantes de estos compuestos reside en la posibilidad de utilizarlos para capturar contaminantes como clorofluorocarbonos (CFC’s), o el CO2 de origen antropogénico. Otras aplicaciones están relacionadas con su potencial uso para transporte y almacenamiento de gases, ya que la relación existente entre el volumen que ocupa un gas en condiciones normales es 164 veces mayor que el que ocupa formando un hidrato con todas sus cavidades llenas, pero sin el coste que supone mantener un gas altamente comprimido. Actualmente, los hidratos de gas naturales despiertan un gran interés debido a su alto contenido en metano, dadas las implicaciones económicas de este como combustible y su impacto medioambiental como gas de efecto invernadero [3]. A pesar de los numerosos estudios teóricos y computacionales sobre hidratos de gas que existen en la literatura [4,5], no encontramos apenas referencias que incluyan las condiciones oceánicas, en particular la presencia de iones –Na+ y Cl- principalmente-- disueltos en el agua líquida. Es por ello que proponemos y verificamos un modelo molecular para simular el comportamiento de estos sistemas en condiciones más realistas.
Speaker: Fernández Fernández Ángel Manuel (Universidad de Vigo)
• 16:45
Coffee break 30m
• 17:15
Uso de materiales alveolares de bajo coste para aumentar la producción de biogás 15m
Una de las técnicas empleadas para aumentar las poblaciones bacterianas en el interior de los biodigestores anaerobios es utilizar materiales porosos que incrementen la superficie de fijación de aquéllas. Hasta ahora, los materiales utilizados para tal fin han sido diversas arcillas , zeolitas , sepiolita, saponita y bentonita, carbón activado, fibra de caucho. El resultado ha sido un incremento sustancial de las producciones de biogás, pero con un coste económico prohibitivo. En este trabajo se propone el uso de materiales alveolares hechos a medida del residuo orgánico a tratar mediante Digestión Anaerobia (DA), con el fin de aumentar los rendimientos energéticos – y, por tanto, económicos – de la DA, y que, a la vez, sean de bajo coste. Dichos materiales porosos se obtendrán reciclando los siguientes residuos agrícolas y forestales: cáscara de almendra, cáscara de nuez, carbón vegetal y fibras de kenaf. Se concluye que los mayores rendimientos energéticos a largo plazo (para tiempos de reacción superiores a 112 días) se obtienen cuando se usa carbón vegetal como material alveolar, con un incremento de la producción de metano, respecto a la biometanización de la mezcla pura, del 27,82%.
• 17:30
Mejora de la conductividad térmica de líquidos y de sólidos por adición de nanopartículas. Nanofluidos y nanocompuestos 15m
Speaker: Dr. JOSE MARIA ORTIZ DE ZARATE LEIRA (UNIVERSIDAD COMPLUTENSE)
• 17:45
Densidad hasta 120 MPa y magnitudes derivadas de una polialfaolefina, PAO6 15m
Speaker: Ms. María Jesús García Guimarey (Applied Physics Department, NaFoMat Group)
• 18:00
Caracterización termofísica de nanolubricantes basados en grafeno y trioleato de trimetilolpropano 15m
En esta comunicación hemos caracterizado diferentes propiedades termofísicas (propiedades volumétricas, viscosidades y velocidades del sonido) de dispersiones de nanoplaquetas de grafeno (GnP) en una base lubricante de tipo éster, el trioleato de trimetilolpropano (TMPTO) con la finalidad de analizar el efecto que juegan la concentración de nanopartículas y la temperatura en estas propiedades.
Speaker: Mr. José Manuel Liñeira del Río (Applied Physics Department, NaFoMat Group)
• 18:15
Gold nanoparticles dispersions in PEG 400 for thermal energy storage. Synthesis and physical characterization 15m
Speaker: Mr. Marco Antonio Mascos Millán (Departamento de Física Aplicada, Universidade de Vigo, E-36310, Vigo, Spain)
• 18:30
Desarrollo de lubricantes basados en nanoaditivos para la producción de energías renovables y uso eficiente de la energía 15m
Speaker: Dr. María J.P. Comuñas (Universidad de Santiago de Compostela)
• 18:45
A Low-Energy Electron Microscope for the Study of Growth and Dynamics of Surfaces in Spain 30m
Low-energy electron microscopy (LEEM) is a full-view non-scanning technique in which a beam of low-energy electrons that has interacted with a sample is imaged. The technique characterizes the sample's surface in real-space with nanometer-scale lateral resolution. The ability to acquire images at a fraction of a second during temperature changes, while depositing films and exposing materials to reactive gases makes LEEM invaluable for studying dynamical processes on surfaces. The first pure-electron LEEM microscope in Spain is being installed at the Instituto de Química Física “Rocasolano” in Madrid. The goal of this talk is to provide an introduction to the capabilities of this instrument through examples taken from our published work, so it can benefit the spanish research community.
Speaker: Dr. Juan de la Figuera (Instituto de Quimica Física "Rocasolano")
• 19:15
Reunión del GET 1h
Speaker: Prof. José Ramón Solana Quirós (Departamento de Física Aplicada. Universidad de Cantabria)
• 21:00 22:00
Reception 1h Salón Noble / Claustro (Colexio Fonseca)

### Salón Noble / Claustro

#### Colexio Fonseca

• Tuesday, 18 July
• 09:00 13:40
Plenary II Aula Magna

### Aula Magna

#### Santiago de Compostela, Facultade de Química

Av. das Ciencias s/n, 15701 Santiago de Compostela, A Coruña, Spain
• 09:00
Transversal Session I. Investigación en Física en España: Implicación en Infraestructuras Cientifico Técnicas Singulares y participación en Organismos Internacionales 1h 40m
Investigación en Física en España: Implicación en Infraestructuras Cientifico Técnicas Singulares y participación en Organismos Internacionales
Speakers: Dr. Jose Benlliure (University of Santiago de Compostela), carlos pajares (Professor)
• 10:40
Coffee break and poster session 30m
• 11:10
Quantum Computations and Quantum Simulations With Trapped Ca+ Ions 50m
In this talk, the basic toolbox of the Innsbruck quantum information processor based on strings of trapped Ca+ ions will be reviewed. For quantum computation, a scalable Shor algorithm was realized [1] with a string of trapped Ca+ ions. Towards scaling the trapped ion quantum computer, we encode one logical qubit in entangled states distributed over seven trapped-ion qubits. We demonstrate the capability of the code to detect one bit flip, phase flip or a combined error of both, regardless on which of the qubits they occur. Furthermore, we apply combinations of the entire set of logical single-qubit Clifford gates on the encoded qubit to explore its computational capabilities [4]. The quantum toolbox is further applied to carry out both analog and digital quantum simulations. The basic simulation procedure and its application will be discussed for a variety of spin Hamiltonians. Engineered quantum systems offer the opportunity to study emergent phenomena in a precisely controlled and otherwise inaccessible way. We present a spectroscopic technique to study artificial quantum matter and use it for characterizing quasiparticles in a many-body system of trapped atomic ions [5]. Finally, we report the experimental demonstration of a digital quantum simulation of a lattice gauge theory, by realizing (1 + 1)-dimensional quantum electrodynamics (the Schwinger model) on a few-qubit trapped-ion quantum computer [6]. [1] T. Monz et al., Science 351, 1068 (2016). [2] P. Jurcevic et al., Nature 511, 202 (2014). [3] T. Northup and R. Blatt, Nature Photonics 8, 356 (2014). [4] D. Nigg et al., Science 345, 302 (2014). [5] P. Jurcevic et al., Phys. Rev. Lett. 115, 100501 (2015). [6] E. A. Martinez et al., Nature 534, 516 (2016).
Speaker: Prof. Rainer Blatt
• 12:00
Manipulating Relativistic Electrons with Intense Laser Pulses 50m
In many domains, modern science relies on robust technology, and advanced technology relies on basic fundamental research. Fundamental researches on superconductivity, even if some aspects are not yet fully understood, have conducted to the discovery of many applications such as magnetic resonance imaging or superconducting cavities that are now used in modern accelerators, which have been then successfully used to understand deeply the structure of matter and fundamental interactions. This “virtuous circle” also applied for Laser Plasma Accelerators (LPA). LPA required first powerful laser systems able to deliver stable laser pulses in the few tens of TW to a few PW and, second, the mastering of the giant electric field components with TV/m amplitude [1] in the plasma medium with this well characterized laser pulse. The art of this new area of science relies on our abilities to manipulate relativistic electrons with intense laser pulses.To illustrate the beauty of laser plasma accelerators I will show different experimental results that we recently performed that allow to improve the quality of the electron beam, its stability [2] and its energy gain in longitudinal field [3], or the reduction of its divergence using radial field [4]. I’ll then show how by controlling the quiver motion of relativistic electrons intense and bright X-rays beam are produced in a compact and elegant way [5-7]. Finally I’ll show some examples of applications [8]. [1] V. Malka, Science22, 298 (2002) [2] E. Guillaume et al., Phys. Rev. Lett. 115, 155002 (2015) [3]C. Thaury Scientific Report, 10.1038, srep16310 (2015) [4] C. Thaury et al., Nature Comm. 6, 6860 (2015) [5] K. Ta Phuoc et al., Nature Photonics 6, 308-311 (2012). [6] S. Corde et al., Review of Modern Phys. 85 (2013) [7] I. Andriyash et al., Nature Comm. 5, 4736 (2014) [8] V. Malka et al., Nature Physics. 4, 447 (2008)
Speaker: Prof. Victor Malka
• 12:50
Fire and Ice: The Chicxulub asteroid impact and the K-Pg extinction 50m
The extinction that marks the end of the Cretaceous period and the beginning of the Paleogene, 66 Ma, is one of the five great extinctions of the Phanerozoic eon. It is estimated that 75-80% of all species became extinct, including all marine dinosaurs and almost all terrestrial dinosaurs. In 1980, Luis Alvarez et al. proposed that the extinction was caused by the impact of a 10-km asteroid; in 1981, Glen Penfield and Antonio Camargo identified the impact crater in the vicinity of the town of Chicxulub, in the Yucatán Peninsula. We present the results of numerical simulations of the consequences of the impact, assuming as an initial condition that the impact produced global fires that injected as much as 70,000 Tg of carbon soot into the atmosphere. The results show that a small part of this soot is entrained into the circulation of the stratosphere and mesosphere, where it remains suspended for a prolonged period, absorbing solar radiation and blocking sunlight at the surface. As a consequence, the Earth’s surface experiences a “global night” lasting 1-2 years, followed by a period of reduced illumination (5-50% of normal) for another 4-5 years. The suppression of sunlight at the surface causes global cooling of about 15°C (10-12° in the oceans and 25-30°C on land). At the same time, the soot in heats the stratosphere, which warms by as much as 100°C. Stratospheric heating affects the chemical composition and photochemistry, such that the ozone layer is reduced globally by 80% of normal, which allows high levels of UV radiation to reach the surface. The combination of darkness, cold, and enhanced UV flux appears to be able to account for the widespread pattern of extinction of Cretaceous flora and fauna.
Speaker: Prof. Rolando Garcia
• 13:40 15:00
Lunch break 1h 20m Campus Vida USC

#### Campus Vida USC

• 15:00 19:00
Nuclear Physics II Aula Química Física (Facultad Química (USC))

### Aula Química Física

• 15:00
The role of Monte Carlo simulations in the radiobiological optimization of proton therapy treatment plans 25m
Speaker: Dr. Miguel Antonio Cortes-Giraldo (Universidad de Sevilla)
• 15:25
Simulation of Simultaneous PET Imaging of Antibodies Labeled with Zr-89 and I-124 Based on Triple Coincidences 15m
Multiplexed PET (mPET) is a new imaging technique able to provide separated images of the biodistribution of two radiotracers based on their standard double coincidences and the triple coincidences generated by one of them. In this work, we evaluated the feasibility of using mPET to improve and facilitate the kinetic analysis of studies with monoclonal antibodies (mAb). By simultaneously administering and imaging mAb labeled with either Zr-89 or I-124, the differences in the activity concentration in the tumor of each isotope can be used to improve tumor detection and the estimation of some of its properties. We have evaluated the proposed method with dynamic realistic simulations of numerical mice phantoms performed with PeneloPET for the preclinical SuperArgus scanner considering all relevant physical effects such as positron emission and annihilation, emission of the prompt gamma rays, and detection in the scanner. The good results demonstrate that this in-silico approach can be used for testing different acquisition protocols before in-vivo acquisitions. It also shows that mPET can be an additional new tool for kinetic modelling of mAb studies.
Speaker: Dr. Joaquin L. Herraiz (University Complutense of Madrid)
• 15:40
Medida de producción de isótopos b+ para verificación de rango en protonterapia 15m
La verificación de la posición del pico de Bragg durante el tratamiento de tumores con haces de protones es uno de los aspectos clave para una mayor eficacia de la protonterapia. Entre las distintas técnicas que se están proponiendo y que ya se están utilizando en pacientes se encuentra la medida de la distribución de núcleos radioactivos + (conocidos como isótopos PET) producidos por el haz de protones a lo largo de su trayectoria, lo cual permite actualmente detectar variaciones de sólo unos pocos milímetros en el rango de haz. En este contexto, es necesario conocer mejor las tasas de producción de varios de estos isotopos (principalmente 11C, 13N y 15O, pero también 30P y 12N entre otros) para Ep=0-230 MeV y una amplia variedad de isótopos y reacciones para los que, aunque hay datos experimentales, se observan diferencias sustanciales. En este sentido se ha comenzado un proyecto para realizar estas medidas y se ha realizado un primer experimento a energías inferiores a 18 MeV en el ciclotrón del Centro Nacional de Aceleradores (CNA), con el plan de realizar medidas adicionales a mayores energías a partir del 2018 en otros aceleradores. En esta contribución se describirán los experimentos realizados hasta la fecha en el CNA y los resultados obtenidos así como los objetivos y planes para medidas a mayores energías.
Speaker: Dr. Carlos Guerrero (Universidad de Sevilla)
• 15:55
Performance improvement of MACACO, a Compton telescope for treatment monitoring in hadron therapy. 20m
Speaker: Dr. Gabriela Llosa (IFIC (CSIC/UV))
• 16:15
Nuevo método de reconstrucción de mapa de dosis para verificación de técnicas de radioterapia avanzadas a partir de un detector de semiconductor a tiras 15m
Speaker: A. Damián Domínguez Muñoz (Universidad de Sevilla)
• 16:30
High-Gradient RF laboratory at IFIC for medical applications 15m
General interest has been shown over the last years for compact and more affordable facilities for hadron-therapy. The High-Gradient (HG) know-how and technology for normal-conducting accelerating RF (Radio-Frequency) electron linac (linear accelerator) structures recently developed for projects such as CLIC (CERN), has raised the achievable accelerating gradient from 20-30 MV/m up to 100-120 MV/m. This gain has come through a better understanding of the high-power RF vacuum arcs or breakdowns (BD) phenomena, the development of quantitative HG RF design methods and refinements in fabrication techniques. This can allow for more compact linacs also for protons, which is potentially important in the new trend in hadron-therapy of using linacs able to provide protons of 70-230 MeV or light ions of 100-400 MeV/u. Linacs are of particular interest for medical applications because they can provide a high degree of flexibility for treatment, such as running at 100-400 Hz pulse rate and pulse-to-pulse beam energy (and intensity) variations. This kind of accelerator is very well suited to treat moving organs with 4D multi-painting spot scanning technique. Project studies like TULIP are taking advantage of these developments and pursuing medical linacs of reduced size. HG operation, which is carried out under ultra-high vacuum conditions (~10-9 mbar), is limited by the BD phenomena and is characterized by the BD-Rate (BDR) or number of BD per pulse and meter. New fresh structures initially operate at a reduced performance and must be conditioned through extended high-power rf operation until the maximum operational gradient is reached. This process is a time consuming, and consequently costly task (> 350 million pulses) which is important to understand and reduce. The IFIC HG-RF laboratory is designed to host a high-power and high-repetition rate facility for testing S-Band (2.9985 GHz) normal-conducting RF structures. This facility will allow the development, RF conditioning and studies of the BD phenomena in HG structures.
Speaker: Dr. Daniel Esperante Pereira (IFIC - U. de Valencia / CSIC)
• 16:45
Coffee Break 30m

Coffee Break

• 17:15
Proton minibeam radiation therapy widens the therapeutic window for radioresistant tumors 20m
• 17:35
Hybrid Monte Carlo dose calculation for low-energy X-rays Intra-Operative Radiation Therapy. 15m
In this work we present a dose calculation algorithm that computes dose distributions for low-energy X-rays intra-operative radiation therapy with INTRABEAM within minutes, fully taking into account the different structures of the patient. A detailed validation against Monte Carlo simulations have been performed, and a good agreement (2%-1 mm gamma evaluation) was reached.
Speaker: Ms. Paula Ibáñez (Grupo de Física Nuclear, Dpto. Física Atómica, Molecular y Nuclear, Facultad de CC. Fïsicas, Universidad Complutense de Madrid, CEI Moncloa, Madrid, Spain)
• 17:50
Dose average linear energy transfer calculation from microdosimetric quantities with the Geant4 toolkit: Application for proton therapy beams 15m
Speaker: Ms. Anna Baratto-Roldán (Centro Nacional de Aceleradores - Universidad de Sevilla)
• 18:05
Impact of motion compensation and partial volume correction on 18F-NaF PET/CT imaging of coronary plaque 20m
Background: Recent studies suggest that 18F-NaF PET enables visualization and quantification of plaque micro-calcification in the coronary tree. However, PET imaging of plaque calcification in the coronary arteries is challenging because of the respiratory and cardiac motion as well as partial volume effects. The objective of this work is to implement an image reconstruction framework, which incorporates compensation for respiratory and/or cardiac motion (MoCo) and partial volume correction (PVC), for cardiac 18F-NaF PET imaging in PET/CT. Materials and methods: Realistic simulations (Biograph TPTV and Biograph mCT) and phantom acquisitions (Biograph mCT) were used. Different uptake values of the plaques (spherical shape, 4 mm diameter) were evaluated in the simulated datasets, with lesion-to-background ratios (LBR) of 10, 20, 50 and 70:1. The experimental phantom included three plaque-type lesions of 18, 31 and 36 mm3 respectively, with a LBR of 70:1. After validation of the MoCo and PVC methods, they were applied to four pilot 18F-NaF PET/CT patient studies. In all cases, the MoCo-based image reconstruction was performed using the STIR software [3]. The PVC was obtained from a local projection (LP) method, previously evaluated in preclinical and clinical PET [4]. We evaluated the noise in the image (measured in a background region) and the lesion-to-background ratio (LBR) values of the plaques, using the maximum (LBRmax) voxel value within the segmented plaque. Results: After applying MoCo and PVC, LBRmax increased by 200% to 1110% in the simulated data, by 212% to 614% in the phantom experiments and by 14% to 188% in the plaques with positive uptake observed in the patients. Similar noise values were observed in all images, in contrast to the significantly higher noise observed when using respiratory or cardiac gating. Conclusion: A combined MoCo and PVC approach for PET/CT imaging was implemented within the STIR reconstruction framework. The simulated datasets, experimental and patient data show significant improvement in the quantification of small coronary lesions when MoCo and PVC are taken into account.
Speaker: Dr. Jacobo Cal-Gonzalez (QIMP group, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna)
• 18:05
Positron Range and prompt-gamma modeling in PET imaging 20m
Speaker: Dr. Jacobo Cal-Gonzalez (QIMP group, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna)
• 18:25
ASAMBLEA GEFN 35m
Speaker: Dr. Dolores Cortina (Universidad Santiago Compostela)
• 15:00 19:10
Quantum Materials and Technologies (GEFES) I Aula Química Inorgánica (Facultad Química (USC))

### Aula Química Inorgánica

• 15:00
Bending Oxides 30m
Bending a dielectric material of any symmetry generates polarization thanks to the so-called flexoelectric effect. Conversely, applying a voltage to a dielectric material will cause it to bend spontaneously, due to the converse (or inverse) flexoelectric effect. Both direct and inverse flexoelectricity scale up with the inverse of the thickness of the material, so this phenomenon is gaining prominence with the advent of nanotechnology. On the other hand, and despite its surge in popularity, there have been –until recently- enormous gaps in our knowledge about flexoelectricity, including such fundamental questions as the actual order of magnitude of the intrinsic flexoelectric coefficients, the role of surfaces in the total flexoelectric performance, or even whether flexoelectricity can only happen in insulators. Seeking to answer these questions, the PhD project of Jackeline Narváez has studied the flexoelectricity of single crystals. Her results resolve previous controversies by establishing that (i) the intrinsic flexoelectric coefficients of even the best flexoelectric materials does not exceed a few nC/m; (ii) in relaxors (and some ferroelectrics), there are additional contributions from polar nanodomains that can elevate the total flexoelectric coefficient to the µC/m range; (iii) the contribution of surfaces is at least as big –and sometimes bigger- as intrinsic bulk flexoelectricity and, contrary to previously thought, it is (at least indirectly) measurable, and (iv) semiconductors can also be flexoelectric, and moreover their flexoelectric coefficients can reach the mC/m range; this is one million times more than the intrinsic flexoelectricity of dielectric insulators. In my talk, I will give an overview of the field of flexoelectricity and a summary of the main results (contextualzing their significance) from the PhD thesis of Jackeline Narvaez, ex-aequo winner of the GEFES award to the best thesis in experimental condensed matter physics.
Speaker: Prof. Gustau Catalan (ICREA and ICN2)
• 15:30
On the origin of magnetic anisotropy in two dimensional CrI3 30m
The observation of ferromagnetic order in a monolayer of CrI 3 has been recently reported, with a Curie temperature of 45 Kelvin and off-plane easy axis. Here we study the origin of magnetic anisotropy, a necessary ingredient to have magnetic order in two dimensions, combining two levels of modeling, density functional calculations and spin model Hamiltonians. We find two different contributions to the magnetic anisotropy of the material, both favoring off-plane magnetization and contributing to open a gap in the spin wave spectrum. First, ferromagnetic super-exchange across the ≃ 90 degree Cr-I-Cr bonds, are anisotropic, due to the spin orbit interaction of the ligand I atoms. Second, a much smaller contribution that comes from the single ion anisotropy of the S = 3/2 Cr atom. Our results permit to establish the XXZ Hamiltonian, with a very small single ion easy axis anisotropy, as the adequate spin model for this system. Using spin wave theory we estimate the Curie temperature and we highlight the essential role played by the gap that magnetic anisotropy induces on the magnon spectrum.
Speaker: Mr. Jose Lado (International Iberian Nanotechnology Laboratory)
• 16:00
Coherent control of nonlinear optical processes in single optical nano-antennas 30m
Optical nano-antennas have the capability to control the localisation of light on nanometer spatial scales. Coherent control on the other hand, is a technique that often uses femtosecond laser pulses to control light matter-interactions on an ultrafast time scale. Here, we combine ultrafast coherent control with the investigation of nonlinear optical responses in individual plasmonic nano-antennas to demonstrate the simultaneous ultrafast and ultra-small control of light-matter interactions. This work provides a comprehensive study of the ultrafast coherence in optical nano-antennas and how to engineer the phase of ultrashort laser pulses to exploit it for imaging applications.
Speaker: Dr. Nicolo Accanto (CNRS, Paris Descartes Univerity)
• 16:30
Coffee Break and Posters 1h
• 17:30
Oxygen vacancies in strained SrTiO3 thin films: formation enthalpy and manipulation 20m
The control and tune of the cationic and anionic defects formation is a novel route to discover new functional properties in transition metal oxides in general, and particularly in SrTiO3 [1]. STO is a diamagnetic quantum paraelectric insulator, in which oxygen vacancies are typical anionic defects. Due to the donor character of the VO and the very large electron mobilities of these defects, even the slightest concentration of vacancies produces a measurable electrical conductivity. Thus, the presence of VO plays a very important role in the transport properties of STO both in the form of thin films and interfaces, such as the well-studied STO/LaAlO3 interface [2]. Additionally, this heterostructures are subjected to epitaxial strain, which has been shown a remarkable effect in the oxygen vacancy formation enthalpy. For this reason, it is necessary to perform a systematic study of the VO formation energy in STO as a function of strain and understand the influence of these anionic defects in the transport properties of STO. Moreover, the cationic defects, namely strontium vacancies (VSr), also could play a crucial role in the structural properties of the STO thin films [3], producing a characteristic rotation pattern of the TiO6 octahedra to accommodate the coherent epitaxial strain. In this work, we present a complete thermodynamic study of VO formation in e-doped thin films grown by Pulsed Laser Deposition. Hall effect measurements confirmed that each VO is doubly ionized and donates two electrons to the conduction band of STO. Furthermore, our results demonstrate that both, compressive and tensile strain, leads to a decrease in the VO formation enthalpy, in good agreement with the reported ab-initio calculations [4]. On the other hand, we determined the existence of a different rotation pattern of the TiO6 octahedra of the thin films under compressive or tensile strain, which is related with the unintentional presence of the strontium vacancies in the STO thin films. Additionally, we show the possibility to manipulate the oxygen vacancies by applying an external electric field with an Atomic Force Microscopy tip. We demonstrate a change in the local volume and surface potential of the sample associated to the accumulation of oxygen vacancies. The application of a negative (positive) voltage causes a local expansion (contraction) in the surface of the sample about a half or one unit cell height, as can be observed in Figure 1. We also determine the diffusion coefficient of the Vo after removing the electric field as a function of strain, proving that the mechanical effect is stable for hours as well as reversible [5]. References [1] S. V. Kalinin, N. A. Spaldin, Science 341 (2013) 858. [2] A. Ohtomo, H.Y. Hwang, Nature 427 (2004) 123. [3] A. Sarantopoulos, E. Ferreiro-Vila, V. Pardo, C. Magén, M. H. Aguirre, F. Rivadulla, Physical Review Letters 115 (2015) 166801. [4] S. -Y. Choi, S. -D. Kim, M. Choi, H. -S. Lee, J. Ryu, N. Shibata, T. Mizoguchi, E. Tochigi, T. Yamamoto, S. -J. L. Kang, Y. Ikuhara, Nano Letters 15 (2015) 4129. [5] L. Iglesias, A. Sarantopoulos, C. Magén, F. Rivadulla, Physical Review B 95 (2017) 165138.
Speaker: Ms. Lucía Iglesias (PhD Student)
• 17:50
Realization of a Ferroelectric-Domain-Wall Tunnel Junction 20m
Harnessing the electronic response of ferroelectric thin films may be key in the realization of the visionary concept “The Wall is the Device” [1] towards future non-volatile memories, logic elements or energy-harvesting devices. While extensive work has been devoted to exploit the technological opportunities of the ferroelectric ground state in ultrathin films, and to understand the nature and properties of its domain walls, they have yet to be incorporated into an active device element [2,3]. Here we show results of a magnetic tunnel junction device consisting of a ferroelectric BaTiO3 tunnel barrier just 4.4-nanometer thick, with ferromagnetic La0.7Sr0.3MnO3 electrodes, containing a head-to-head domain wall within its thickness. A confined electron gas is formed at the ferroelectric domain wall, stabilized by oxygen vacancies, which controls the tunneling transport of the magnetic tunnel junction. Resonant tunneling assisted by the discrete levels of the ferroelectric quantum well gives rise to strong quantum oscillations of the tunneling conductance. Our engineered, highly constrained, domain wall provides a major step forward towards exploiting the electronic properties of domain walls for ferroelectric tunnel barriers with new functionalities [4].
Speaker: Dr. Javier Tornos (Instituto de Ciencia de Materiales Madrid - CSIC)
• 18:10
The Magnetochiral effect in Topological Semimetals 20m
Weyl and Dirac semimetals are topologically nontrivial metallic systems. Many transport and optical properties of these systems display signatures of their nontrivial topological nature, even being dissipative. Here we will demonstrate that Weyl semimetals display a rather exotic response called "magnetochiral effect" appearing in chiral systems under the effect of external magnetic fields. moreover, we will show how the magnetochiral effect shows up in Weyl semimetals in the linear regime in transport quantities, contrary to all the previously cases found in the literature, where the magnetochiral effect appear in the non-linear regime.
Speaker: Dr. Fernández Cortijo (Instituto de Ciencia de Materiales de Madrid, CSIC)
• 18:30
Observation of Large Topologically Trivial Fermi-Arcs in the Candidate Type-II Weyl Semimetal WTe2 20m
The discovery of non-saturating magnetoresistance and pressure induced superconductivity has drawn much attention to WTe2 lately. [1] The interest on this material increased when it was very recently proposed to be the first example of a new class of materials dubbed type-II Weyl semimetals.[2] The electronic band structure of a type-II Weyl semimetal shows tilted Weyl cones that arise from topologically protected crossings of valence and conduction bands causing touching points between electron and hole pockets near the Fermi level. The projection of these so called Weyl points onto a surface must be connected by Fermi arcs. In WTe2 the surface Fermi arcs terminate inside the bulk electron and hole pockets where the surface states strongly hybridize with bulk states and can no longer be observed experimentally. Additionally, WTe2 is non centro-symmetric, which implies inequivalent top and bottom surfaces with a distinct electronic structure that could not be resolved so far. Together, these subtleties render the identification of the topological nature of the Fermi arcs challenging. We present several advances towards a comprehensive understanding of WTe2 electronic structure. Using micro-focus laser-ARPES we resolve for the first time the distinct electronic structure of both inequivalent top and bottom (001) surfaces. The presence of large surface state Fermi arcs on both surfaces is established. [3] Using surface electronic structure calculations we further demonstrate that these Fermi arcs are topologically trivial and that their existence is independent of the presence of type-II Weyl points in the bulk band structure. Contrary to common believe, the observation of surface state Fermi arcs is thus not suitable to robustly identify a type-II Weyl semimetal. [4] Finally, we show that the bulk Fermi surface is formed by three-dimensional electron and hole pockets with areas that are found to be in good agreement with transport experiments with the exception of small hole pockets that have not been observed in quantum oscillation experiments. This work was supported by the Swiss National Science Foundation through the Ambizione grant (PZ00P2_161327)
Speaker: Dr. Flavio Bruno (Department of Quantum Matter Physics, University of Geneva, Switzerland.)
• 18:50
Light-matter interfacing with quantum dots: a polarization tomography approach 20m
We report on the polarization tomography of a resonantly-driven quantum-dot cavity-QED device. A single quantum-dot excitonic transition induces a macroscopic rotation on the polarization of the reflected photons, with a polarization purity remaining above 84%.
Speaker: Dr. Carlos ANTON SOLANAS (Center of Nanosciences and Nanotechnology (C2N), CNRS, University Paris-Sud, University Paris-Saclay, C2N Marcoussis, Marcoussis, France)
• 15:10 19:20
Molecular Physics at the Edge I Aula Matemáticas (Facultad de Química (USC))

### Aula Matemáticas

• 15:10
Welcome 5m
Speakers: José Campos-Martínez (CSIC), Dr. Massimiliano Bartolomei (Instituto de Física Fundamental - CSIC)
• 15:15
Theoretical study of the dynamics of superfluid helium nanodroplets doped with alkali atoms 30m
see attached file
• 15:45
Structure and dynamics of ions in gas phase: interplay between experiments and theory in IRMPD spectroscopy 20m
IR vibrational spectroscopy is a widespread technique for the characterization of molecules in gas phase, highly sensitive to small structural changes, like hydrogen bonding patterns, thus allowing the detection of motifs and signatures o¬¬ccurring in relevant processes. In the case of gaseous ions, the low density of the sampled species requires the use of a sensitive 'action' spectroscopy approach such as IRMPD (IR Multiple Photon Dissociation) spectroscopy. By this technique the fragmentation due to absorption of multiple IR photons in resonance with active vibrational modes of the molecular ion is probed by mass spectrometry. The IRMPD spectrum is then obtained by reporting photo-fragmentation yield as a function of the IR photon energy. The interpretation of the experimental spectra needs in any case a strong computational support to correctly assign the main features to the corresponding vibrational modes and to identify the populated isomers and/or conformers, particularly when flexible molecule are investigated. This combined approach has recently allowed a comprehensive description at the molecular level for the reactive events responsible for cisplatin activity, including the first direct evidence of a prototypical Eigen-Wilkins encounter complex in solution. The last years have also witnessed increasing applications of IRMPD kinetics experiments, where the use of selected active IR photons can produce selective photo-fragmentation of different isomers or even different conformers, thus enabling the qualitative and quantitative characterization of their population in the experimental mixture.
Speaker: Prof. Cecilia Coletti (Dipartimento di Farmacia, Università G. d'Annunzio Chieti-Pescara)
• 16:05
Laboratory study of inelastic collisions of O2 with He at low temperature 20m
State-to-state rate coefficients for the inelastic collisions of O2 with He at low temperature are investigated by means of an experimental procedure based on supersonic gas jets probed by Raman spectroscopy. The procedure employs a kinetic master equation (MEQ) which describes the time evolution of the rotational populations of O2 along three supersonic jets of O2 + He mixtures. The MEQ is expressed in terms of experimental quantities (number density and rotational populations), and calculated rate coefficients for the O2:He and O2:O2 inelastic collisions from the literature. By scaling these rate coefficients, a satisfactory agreement with the experiments is accomplished for temperatures between 10 and 34 K.
Speaker: Dr. José M. Fernández (Instituto de Estructura de la Materia CSIC)
• 16:25
Energy transfer in gaseous mixtures for atmospheric and astrochemical modelling 20m
The development of realistic kinetic models of gaseous systems is a fundamental issue in the study of Earth and planetary atmospheres, plasma chemistry, gas flows and astrochemistry. Particularly, the adoption of a state-to-state level of detail in the description of the molecular energy transfer [1,2], a desirable and necessary improvement, requires much insight into the dynamics of the inelastic collisions and the prompt availability of state-specific energy transfer probabilities and rate coefficients. Existing venerable approximated theories of the energy transfer, such as the Schwartz-Slawsky-Herzfeld one, are not really state-specific and have limited validity. Therefore probabilities and cross sections have to be calculated directly by simulation of the dynamics of the molecular collisions. The reliability of the simulations is conditional to the availability of accurate descriptions of the intermolecular interactions occurring between pairs of the molecular species present in the gas mixture. Here, we present examples of calculation of rate coefficients of energy transfer in mixtures containing CO2 and N2 [3-6] obtained applying a semiempirical approach to the interaction modelling, based on (i) a physically meaningful partition of the contribution to the interaction, (ii) the use of data from molecular beam experiments and (iii) ab initio calculations. An extension of such an approach can be also applied to the modelling dynamics and kinetics of gas-surface systems. Acknowledgments A. L. acknowledges financial support from the Dipartimento di Chimica, Biologia e Biotecnologie dellUniversita di Perugia (FRB, Fondo per la Ricerca di Base), from MIUR PRIN 2010/2011 (contract 2010ERFKXL 002) and from “Fondazione Cassa Risparmio Perugia (Codice Progetto: 2015.0331.021 Ricerca Scientifica e Tecnologica)”. A. L. and F. P. acknowledge the Italian Ministry for Education, University and Research, MIUR, for financial supporting: SIR 2014 “Scientific Independence for young Researchers” (RBSI14U3VF) and financial support from MIUR PRIN 2015 (contract 2015F59J3R 002). References [1] Capitelli, M., Ferreira, C. M., Gordiets, B. F., Osipov, R.: Plasma kinetics in atmospheric gases; Springer Verlag, 2000. [2] E. Kustova, E. Nagnibeda, State-to-state theory of vibrational kinetics and dissociation in three-atomic gases; In Rarefied Gas Dynamics; T. Bartel, M. Gallis, Eds.; AIP Conference Proceedings, Vol. 585, pp. 620–627, IOP Publishing, Bristol, England, 2001.  [3] M. Bartolomei, F. Pirani, A. Lagana, A. Lombardi, A full dimensional grid empowered simulation of the CO2 + CO2 processes, J. Comput. Chem. 33 (2012) 1806. [4] A. Lombardi, N. Faginas Lago, A. Laganà, F. Pirani, S. Falcinelli, Lecture Notes in Computer Science 7333 Part I (2012) 387. [5] A. Lombardi, N. Faginas-Lago, L. Pacifici, A. Costantini, Modeling of energy transfer from vibrationally excited CO2 molecules: cross sections and probabilities for kinetic modeling of atmospheres, flows, and plasmas, J. Phys. Chem. A 117 (2013) 11430. [6] A. Lombardi, F. Pirani, A. Laganà, M. Bartolomei Energy Transfer Dynamics and Kinetics of Elementary Processes (Promoted) by Gas-Phase CO2-N2 Collisions: Selectivity Control by the Anisotropy of the Interaction 33 J. Comp. Chem. (2016) 1463.
Speaker: Dr. Andrea Lombardi (Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia)
• 16:45
Automated Discovery of Reaction Mechanisms and Kinetics Using Dynamics Simulations 20m
A novel computational method is proposed in this talk for use in discovering reaction mechanisms and solving the kinetics in reactive systems [1,2]. The method does not rely on either chemical intuition or assumed a priori mechanisms, and it works in a fully automated fashion. It has two components: accelerated chemical dynamics simulations and a post-processing geometry-based algorithm that selects suitable transition state (TS) guess structures. Two levels of electronic structure calculations are involved in the procedure: a low level (LL) is used to integrate the trajectories and to optimize the TSs, and a higher level (HL) is used to refine the structures. Our method has been successfully employed in the study the dissociation channels of formaldehyde, formic acid (FA), vinyl cyanide (VC), propenal, acryloyl chloride (AC), and protonated uracil (uracil-H+), and also in the study the cobalt-catalyzed hydroformylation and hydrogenation of ethylene [3]. Figure 1 shows a flow-chart outlining the different steps of the automated method needed to study organometallic catalysis.
Speaker: Dr. Emilio Martinez-Nunez (Universidade de Santiago de Compostela)
• 17:05
Coffee Break 25m
• 17:30
Exploring molecular interactions in the condensed phase with full rotational resolution 30m
The interaction of molecules determines chemical reactions and biological processes. Very fine details of such interactions can be unravelled using rotational spectroscopy thanks to its great resolving power. However, rotational spectroscopy is usually restricted to the gas phase. In the condensed phases, interactions are usually so strong that rotational features are overshadowed. An exception is liquid helium where interactions are exceptionally weak. Furthermore, its properties are strongly affected by quantum effects. Also, it is an attractive model substance for theory and for experiment: (i) helium atoms, having only two electrons, greatly facilitate high level ab initio calculations of clusters. (ii) At the temperatures where helium becomes liquid all other substances freeze. Liquid helium is therefore one of the purest, if not the purest of all condensed substances. This exceptional purity has recently been exploited for the investigation of nucleation, growth and solidification of nanoparticles [1]. This presentation will highlight two recent experiments where rotational spectroscopy has been pushed to new limits. The full rotational spectrum of a molecular complex was derived using femtosecond wave packet spectroscopy. In another experiment in liquid helium, molecules were identified in their lowest rotational quantum state in thermal equilibrium. Impulsive alignment of clusters in a beam and fluorescence spectroscopy in bulk helium We have excited a supersonic beam of small C2H2-Hen clusters non-resonantly with intense femtosecond laser pulses - a technique called impulsive alignment - thereby creating wave packets composed of rotational eigenstates. The clusters were then probed with a second laser pulse after a set time delay which led to Coulomb explosion. Using the fragment velocity distribution of the C2H2 molecules the state of alignment was determined and the propagation of rotational wave packets was measured in the time domain. A Fourier-transform of the time-spectrum yielded the pure complete rotational spectrum of C2H2-He in excellent agreement with theory [2]. The spectrum showed strong delocalisation of the complex indicating liquid-like character. The excited complex nevertheless rotated coherently over the entire duration of the experiment of 600 ps and showed no signs of dephasing [3]. These results demonstrate that impulsive alignment is well suited to derive structural and dynamical information from clusters, including weakly bound complexes. Production of these complexes requires strong cooling with the consequence that normally only the lowest rotational quantum states are populated. Unlike traditional frequency domain spectroscopy, where selection rules limit the quantum number of states to ΔJ=1, impulsive alignment provides the control that is necessary to excite and probe all J levels, up to the dissociation threshold. In another experiment bulk helium was electronically excited using a corona discharge, creating a rich fluorescence spectrum which was measured as a function of temperature and pressure. Intense fluorescence in the visible region showed the rotationally resolved d u+ b3g transition of He2*. With increasing pressure, the rotational lines merged into single features. The observed pressure dependence of line width, shapes and line shifts established that within liquid helium excimers are either solvated, and cold, or ‘boiling’ within rotationally hot gas pockets. Increase of hydrostatic pressure was found to rotationally cool the excimers at a rate of at least 1010 to 1011 K/s in collisions with the liquids until they occupied the lowest available quantum state [4]. These findings are important with regard to the quest of achieving greatest possible control over molecules, including cooling their degrees of freedom. Also, they suggest that it should be possible to investigate liquid and superfluid helium at the nanoscale over a large pressure and temperature range using molecules as rotational probes. Previous experiments used helium droplets and were therefore restricted to fixed pressures and temperatures. They suggest that by additional control of pressure, temperature and thermodynamic phase unprecedented insight into the structure of solvation layers and interfaces can be achieved. Funding is acknowledged from the Royal Society, The Leverhulme Trust, Erasmus, COST action MOLIM, CONACYT, the Iraq government and the University Joseph Fourier for a visiting professorship for KvH. References [1] H. Gharbi Tarchouna, N. Bonifaci, F. Aitken, L. G. Mendoza-Luna, and K. von Haeften, J. Phys. Chem. Lett. 6 (2015) 3036 [2] G. Galinis, L. G. Mendoza-Luna, M. J. Watkins, C. Cacho, R. T. Chapman, A. M. Ellis, M. Lewerenz, L. G. Mendoza Luna, R. S. Minns, M. Mladenovic, E. Springate, I. C. E. Turcu, M. J. Watkins, L. Kazak, S. Gode, R. Irsig, S. Skruszewicz, J. Tiggesbaumker, K-H. Meiwes-Broer, A. Rouzee, J. G. Underwood, M. Siano and K. von Haeften, Faraday Discuss. 171 (2014) 195 [3] G. Galinis, L. G. Mendoza-Luna, M. J. Watkins, C. Cacho, R. T. Chapman, A. M. Ellis, M. Lewerenz, L. G. Mendoza Luna, R. S. Minns, M. Mladenovic, A. Rouzee, E. Springate, I. C. E. Turcu, M. J. Watkins, and K. von Haeften, Phys Rev. Lett. 113 (2014) 043004 [4] L. G. Mendoza-Luna, N. M. K. Shiltagh, M. J. Watkins, N. Bonifaci, F. Aitken, and K. von Haeften, J. Phys. Chem. Lett. 7 (2016) 4666
Speaker: Dr. Klaus von Haeften (K-nano)
• 18:00
Intrinsic Bond Energies: A real space point of view 20m
A not completely extinguished fire on the nature of the chemical bond in the C2 molecule [1] has re-openened several dormant fronts on the interpretation of bond energies. One of these regards whether we should measure bond strengths with respect to the ground states of the isolated fragments that become bonded, leading to standard bond dissociation energies (BDE), or if appropriately "prepared for bonding", i.e. excited, states should be used instead. The latter view provides larger bond energies, which are usually called intrinsic bond energies (IBE) [2]. Here we examine this problem from a real space partitioning point of view, using the Interacting Quantum Atoms (IQA) approach [3] and electron number distribution functions (EDF) [4]. In IQA, the molecular energy is exactly written as a sum of atomic or fragment self-energies and interatomic (or inter-fragment) interaction energies. The evolution of self-energies along bonding coordinates allows for the identification of the proper atomic/fragment state that reflects the actual electronic state of each fragment in-the-molecule, which can then be used to properly define IBEs. Some results on methane, ethene, ethyne, dinitrogen, and dicarbon will be shown. Acknowledgments We thank the spanish MINECO, grant CTQ2015-65790-P, the FICyT, grant GRUPIN14-049, and the European Union FEDER funds for financial support. References [1] S. Shaik, H. S. Rzepa, R. Hoffmann, Angew. Chemie Intl. Ed , 52. (2013) 3020. [2] D. Cremer, A. Wu, A. Larsson, E. Kraka, J. Mol. Model. 6. (2000) 296 [3] M. A. Blanco, A. Martín Pendás, E. Francisco, J. Chem. Theory Comput. 1 (2005) 1096. [4] E. Francisco, A. Martín Pendás, M. A. Blanco, J. Chem. Phys. 126 (2007) 094102
Speaker: Prof. Ángel Martín Pendás (Universidad de Oviedo)
• 18:20
Continuous spectrum of the H atom after confinement 20m
The study of confinement effects on atomic and molecular systems has been a topic of recent interest [1]. Experimentally it has been possible to insert atoms and molecules within molecular nanocavities. This brings the possibility of employing such as novel structures for different applications, ranging from energy storage and transport to medical use. In addition, depending on the relative sizes, confinement may exert a strong influence on the electronic structure of the guest atom or molecule. This opens up the field for manipulating the spectroscopic properties of the confined atom, which is of great interest in optics and electronics. In this work we focus in the stability of the atom after it is released from the cavity. If the confined atom or molecule is stored in order to be used to produce energy or to be transported, it is important to analyze if the atom is stable when the confining environment is removed. Here we consider the H atom within an impenetrable spherical wall. This simple model reproduces the most important physical features of confinement and the study of the H atom simplifies the computational problem and the possible excitation mechanisms after the system is released. The excited states of the H atom, both in the discrete and the continuous spectra can be obtained very accurately. We assume that the atom is liberated in a period of time that can be considered small as compared with the dynamics of the atom. Then the sudden approximation can be employed to study the state of the atom after confinement is removed. Within this approach, the time dependent state of the released atom after is expanded in terms of the stationary states of the free Hamiltonian. In this expansion both, the bound states and the Coulomb wave functions need to be included. The linear coefficients provide the amplitude probability of the released atom to reach the corresponding stationary state of the unconfined atom. The values of these coefficients are calculated as the overlap of the confined wave function with the wave function of the unconfined atom. In Table 1 we show the energy of the three stationary states of the H atom here studied. We consider hard wall spherical confinement of radius 2 au with the nucleus of the atom fixed at the center of the wall. In Figure 1 we plot the ionization probability energy distribution of the atom when confinement is released. In all of the cases shown, a spread distribution around a principal maximum is obtained. The value of the energy at the maximum is close and smaller thant the energy of the confined state. The other secondary maxima, obtained at higher energies, are less important. The probability distribution presents several nodes, showing that no electrons with that value of the energy can be emitted. Financial support from the Spanish DGICYT and FEDER, project number FIS2015-69941-C2- 2P, and from the Junta de Andalucía (FQM378) and Universidad de Córdoba is gratefully acknowledged. References [1] K. D. Sen (Editor), Electronic structure of quantum confined atoms and molecules, Springer, Switzerland, 2014.
Speaker: Dr. Antonio Sarsa (Universidad de Córdoba, Spain)
• 18:40
Hydrogen Diffusion along SWCNTs: Time-scale Separation and Tunneling Effects 20m
The role of nanostructured materials in both fundamental and applied research is ever increasing due to their interesting and unique properties, from catalysis to electronics [1,2]. A specific field of interest is the understanding and development of storage devices for light gases, specially for energy applications (hydrogen) or environmental reasons (CO2, H2S). Carbon nanotubes have been largely studied with the idea of designing possible storage devices for H2 since the late 1990s [3]. However, a complete quantum dynamics description of the diffusion mechanism inside these structures is still lacking. Here we present a quantum mechanical study of the diffusion of the H2 molecule along a narrow (8,0) Single-walled Carbon Nanotube (SWCNT). Following previous works by our group [4] we have modelled the system considering all the degrees of freedom (DOFs, internal and translational) of the hydrogen molecule and a rigid nanostructure.  The cylindrical shape of the potential energy surface, showing five bound DOFs and one unbound DOF, has prompted us to develop an exact diabatization formalism separating two sets of weakly coupled degrees of freedom: on one hand, the unbound coordinate corresponding to the motion of the center of mass of H2 along the nanotube’s axis, and in the other the remaining 5 DOFs, which are effectively confined by the nanostructure. By applying a complete separability assumption to the confined and unbound DOFs we have also developed an adiabatic approximation to the Hamiltonian, which increases the algorithm efficiency while maintaining the accuracy of the results. Both approaches have been employed to simulate Hydrogen diffusion along the SWCNT at temperatures in the 45-135 K range. The computational advantages provided by both method have enabled us to propagate the wave function beyond 15 picoseconds using the State Averaged - MCTDH [5] code, revealing a remarkable resonant structure as well as a noticeable tunnelling effect. Acknowledgments Financial support from the Spanish Ministerio de Economia y Competitividad (CTQ2013-41307-P) and Generalitat de Catalunya (2014- SGR-25) is acknowledged. M.M.-M. further thanks a pre-doctoral grant from the FPU program (FPU2013/02210) from the Spanish Ministerio de Educacioń, Cultura y Deporte. References [1] G. E. Ioannatos and X. E. Verykios, Int. J. Hydrogen Energy 35, 622 (2010). [2] X. Ren, C. Chen, M. Nagatsu, and X. Wang, Chem. Eng. J. 170, 395 (2011). [3] A. C. Dillon, K. M. Jones, T. a. Bekkedahl, C. H. Kiang, D. S. Bethune, and M. J. Heben, Nature 386, 6623 (1997). [4] M. Mondelo-Martell and F. Huarte-Larrañaga, Chem. Phys. 462, 41 (2015). [5] U. Manthe, J. Chem. Phys. 128, 6 (2008). [6] T. X. Nguyen, H. Jobic, S. K. Bhatia, Phys. Rev. Lett. 105 085901 (2010).
Speaker: Dr. Fermin Huarte-Larrañaga (Universitat de Barcelona)
• 19:00
Quantum Nuclear Motion of Helium and Molecular Nitrogen Clusters in Carbon Nanotubes 20m
High-surface areas and precisely tuned pores of carbon nanotubes make them relevant materials for applications such as in gas adsorption, selective separation of light isotopes, and nanoreactors for quasi one-dimensional confinement of metal nanoparticles. Understanding the role of quantum nuclear effects and intramolecular interactions in the motion of molecules in carbon nanotubes is deeply fundamental. Very recent experimental measurements at low temperatures (2-5 K) of Ohba [1] revealed that much more molecules of nitrogen than helium atoms absorb in small diameter (below 0.7 nm) carbon nanopores, despite of the larger kinetic diameter of the former. Using the helium density functional formulation for a large 4He droplet containing a carbon nanotubes inside, we first show that the experiment can be understood by considering very large zero-point effects in the helium motion, which includes the formation of cavities with zero helium densities [2]. Second, we present an ad-hoc developed nuclear wave-function treatment to provide a detailed insight into the effects of quantum confinement for both N2 and 4He clusters in carbon nanotubes as a function of the tube diameter [3]. Third, we describe our novel pairwise potential model [3] describing the gas adsorption to carbon materials which relies on DFT-based symmetry-adapted perturbation theory. Finally, we propose an embedding approach combining nuclear density functional and wave-function treatments [3]. [1] Ohba , Sci. Rep. 6 (2016) 28992. [2] A. W. Hauser and M. P. de Lara-Castells, . J. Phys. Chem. Lett. 7 (2016) 4929. [3] A. W. Hauser, A. O. Mitrushchenkov, M. P. de Lara-Castells, . J. Phys. Chem. C 121 (2017) 3807.
Speaker: Dr. MARIA PILAR DE LARA CASTELLS (INSTITUTO DE FISICA FUNDAMENTAL, CSIC)
• 15:15 20:00
27º Encuentro Ibérico de Enseñanza de la Física II Aula Biología (Facultad Química (USC))

### Aula Biología

• 15:15
Mesa Redonda: Pruebas finales de bachillerato. Las nuevas pruebas LOMCE 1h 15m
Pruebas finales de bachillerato. Las nuevas pruebas LOMCE
Speaker: Prof. Luis Hervella (vicepresidente de la CIUG. Universidad de Santiago)
• 16:30
Las olimpiadas de física: Preparación de alumnos y Pruebas experimentales 30m
Las olimpiadas de física: Preparación de alumnos
Speakers: Carmen Cabanas (IES Eusebio de la Guarda), Óscar Cabeza (Universidade de A Coruña)
• 17:00
Coffee break 30m
• 17:30
Estudio experimental de la caída de una botella de agua 15m
Hace unos meses surgió “The Bottle Challenge” y se extendió por medio mundo gracias a youtube [1]. Este método consiste en el lanzamiento de una botella, parcialmente vacía, describiendo una parábola para que ésta caiga de pie (Fig 1). A raíz de este reto, se ha realizado un estudio basado en la observación del movimiento de botellas, lanzadas en diferentes condiciones como semillenas, llenas y congeladas, con el fin de obtener los principales factores que influyen en la caída de la botella
Speaker: Prof. Luis Manuel Tobaja (Colegio Maria Auxiliadora)
• 17:45
Construção de uma Escala de Proficiência do Conhecimento Térmico: TCE Aplicado a Alunos Portugueses 15m
O instrumento de coleta de dados foi o teste Introdutory Thermal Concept Evaluation (TCE) de autores australianos [1]. O teste possui 26 itens de múltipla escolha e envolve concepções alternativas para o conhecimento térmico. Nos processos de análises preliminares foram utilizados os softwares estatísticos Bilog-MG e o Excel como apoio, seguindo de acordo com o modelo logístico de três parâmetros da Teoria da Resposta ao Item e condições de identificação de itens-âncora. O estudo apresenta resultados preliminares de 2585 alunos do ensino secundário (10º, 11º e 12º ano) da Região Centro de Portugal, em que resulta na elaboração de uma métrica de proficiência diante das concepções térmicas alternativas dos alunos portugueses no respectivo ano de 2014. As perspectivas visam compreender o perfil conceptual diante das dificuldades alunos portugueses e comparar com alunos brasileiros, disponibilizar para a literatura um instrumento avaliativo para comparação e construção de séries históricas de desempenho, evidenciar estabilização de patamares de dificuldades do conhecimento prévio dos alunos, em especial, propor situações-problemas na perspectiva de uma pedagogia de competências.
Speaker: Prof. Marcel Braga (Universidade de Coimbra)
• 18:00
Acercando la nanotecnología al Bachillerato 15m
La nanotecnología y sus aplicaciones están cada vez más presentes en nuestra vida diaria. Sin embargo, esta rama de la física apenas está representada en el Bachillerato. En este trabajo se presentan problemas relacionados con la nanotecnología que se pueden incluir de forma natural en distintos temas del currículum de esta etapa educativa. Se aportan desarrollos que relacionan de forma sencilla el temario que estudian los alumnos con la investigación en nanociencia. Con ello se pretende reforzar y ampliar sus conocimientos, además de acercarles a un ámbito actual de aplicación de la física. [Abstract completo en el documento adjunto]
• 18:15
Píldoras de Física: una propuesta para compartir recursos entre docentes 15m
Internet supone una inmensa fuente de recursos y cada profesor va encontrando aquellos que le resultan más eficaces, motivadores o novedosos. Pero en esta profesión a veces tendemos al individualismo y, quizás porque no encontramos ocasión, desperdiciamos ese enorme trabajo que supone buscar y filtrar recursos didácticos que podrían usar muchos más docentes si supieran de su existencia. Con este propósito nacieron las Píldoras de Física (PF) [1], una sección iniciada en diciembre de 2015 a propuesta de la Junta Directiva del Grupo Especializado de Enseñanza de la Física (GEEF), cuyo propósito es abrir una nueva vía de comunicación entre los socios de este grupo, mediante el intercambio de ideas, recursos, metodologías docentes, etc., proyectándolas más allá de las aulas, donde se suelen usar de forma individual. De este modo, se informa al resto de socios del GEEF sobre la existencia de materiales (vídeos, textos, simulaciones, reflexiones…) de interés para la enseñanza de la Física.
• 18:30
La Física en el Bachillerato Internacional: algo más que contenidos 15m
La Física en el programa del Bachillerato Internacional (IB) pertenece, junto con la Química y la Biología, a las llamadas asignaturas del grupo 4. Todas pueden impartirse a Nivel Medio o bien a Nivel Superior. En todas las asignaturas del grupo, se imparten no sólo contenidos teóricos, sino también el impacto de estas ciencias en la sociedad, dilemas éticos y morales que plantean diversos temas de estas disciplinas y las implicaciones sociales, ambientales y económicas que conllevan. Así mismo, se pone de relieve la importancia de la cooperación y colaboración internacional en todas las materias de este grupo.
Speaker: Mrs. Consuelo Gajino (15/0086501845)
• 18:45
Diseño de una practica de la laboratorio de medición de ozono según el método de Schönbein 15m
Speaker: Dr. Añel Juan Antonio (EPhysLab, Universidade de Vigo)
• 19:00
Asamblea General GEEF 1h
Speaker: Prof. Verónica TRICIO (Presidenta GEEG)
• 15:15 19:05
Astrophysics II Aula 2.12 (Facultad Química (USC))

### Aula 2.12

• 15:15
Discovery of a binary AGN in Mrk 622 25m Aula 2.12

### Aula 2.12

Mrk622 is a double-peaked narrow emission line galaxy and a dual AGN candidate. New optical long-slit spectroscopic observations clearly show the existence of three spatially separated narrow components in their emission lines, two of them blue and red-shifted respectively with respect to a third one that is found to be at the systemic velocity. The velocity offset between the blue-shifted and the red-shifted components is ∼500 kms−1, and is responsible of the double-peak emission lines. We show that the blue and red-shifted components are produced by two individual AGN. The third systemic component is however a star-bursting galaxy located in the inter AGN region. We thus claim that Mrk 622 is an unresolved, spectroscopically confirmed binary AGN, that harbour a dwarf galaxy in between the pair of AGN.
Speaker: Prof. Jose Miguel Rodriguez-Espinosa (Instituto de Astrofisica de Canarias)
• 15:40
Planetary Nebulae as observed by Gaia: astrometric and photometric expected performance 25m Aula 2.12

### Aula 2.12

Planetary Nebulae (PNe) are among the most beautiful objects that can ever be observed in the sky with a small size telescope. They present a variety of shapes, from circular, multi-shell, hour glass to butterfly-like, all usually with a high degree of symmetry. They are the irrefutable proof that stars are not immutable objects, but they change with time, they evolve and, often, they have a rapid and certainly showy death. About 90% of the stars in the sky are expected to end their life as PNe, those bright enough to ionize the gas and dust that they expelled while contracting towards the White Dwarf phase, but that are not massive enough to explode as supernovae. PNe are important to understand the chemical evolution of our Galaxy (and also of other galaxies) because they enrich the interstellar medium with products synthetized in the stellar interiors and molecules condensed in the circumstellar shells around their dying bodies. One of the most important problems in current PNe studies is the fact that their distances are poorly known [1]. Paradoxically, these objects are being used as extragalactic distance candles because they are easy to detect and, generally, high luminosity objects. Parallax measurements by the astrometric European satellite Gaia [2] promise to drastically change this situation. In this contribution we review some of the main expected contributions of Gaia data to the study of PNe.
Speaker: Dr. Minia Manteiga (Universidad de A Coruña)
• 16:05
Analysis tool for multi dimension clustering of Gaia Outliers 25m Aula 2.12

### Aula 2.12

Gaia is one of the key missions of the European Space Agency (ESA), which will conduct a census of the Milky Way with unprecedented accuracy. It is expected to perform observations of an estimated one billion objects, representing roughly 1% of the objects in our Galaxy. It constitutes the biggest amount of data gathered to date and to perform such a task, the Data Processing and Analysis Consortium (DPAC) was organized. It is structured in nine Coordination Units (CU) each one responsible of different tasks related to the processing and management of the data. Our research group is member of the units 8 and 9, in the first one we are developing data mining techniques in order to perform classification of outliers and astrophysical parameter estimations for stars, while in the second one we are developing various tools in order to make data accessible to the scientific community. The purpose of this text is to explain the work that we are doing for the Gaia mission, focusing on the CU9 part, where we have developed a visualization tool useful for the community in order to understand the current classifications of the stars and allowing them to perform its own classifications and analysis of the data.
Speaker: Mr. Marco A. Alvarez (Universidade de A Coruña)
• 16:30
The BOOTES worldwide Network of Robotic Telescopes 25m Aula 2.12

### Aula 2.12

I will show the technological developments implied in the set up of the worldwide BOOTES Network of 60cm robotic telescopes, as well as a summary of the scientific results achieved so far.
Speaker: Prof. Castro-Tirado Alberto J. (IAA-CSIC)
• 16:55
Coffee 30m Aula Magna (Santiago de Compostela, Facultade de Química)

### Aula Magna

#### Santiago de Compostela, Facultade de Química

• 17:25
Unraveling local Galactic kinematics from the first Gaia data 25m Aula 2.12

### Aula 2.12

The first Gaia Data Release (Gaia-DR1, 14 September 2016) has set the stage for a profound revolution of galactic astronomy. The first released catalogue, named TGAS (Tycho-Gaia Astrometric Solution), contain parallaxes and proper motions with unprecedented accuracy for about two million well-behaved stars placed in the solar neighborhood. In this talk, we will first review the content of this catalogue in terms of astrometric accuracy and completeness, thus briefly describing the ongoing effort to estimate unbiased distances from parallaxes. Secondly we will discuss, as an example, the TGAS capabilities to undertake new challenges such us the derivation of the dynamical age and place of birth of the Young Local Associations (orbits back on time in realistic Galactic potential). Other recent papers unraveling the first scientific exploitation of Gaia data will be commented.
Speaker: Dr. Francesca Figueras (Universitat de Barcelona)
• 17:50
Formación de hielos de hidrocarburos en Plutón: relación entre superficie y atmósfera. 25m Aula 2.12

### Aula 2.12

Los datos obtenidos de la misión “New Horizons” han confirmado la presencia de hidrocarburos en la superficie de Plutón. Elementos como metano, etano, eteno y acetileno, se habían propuesto como componentes de dicha superficie a partir de observaciones con diferentes instrumentos terrestres y de simulaciones basadas en datos de laboratorio. A diferencia de otros objetos trans-neptunianos, la formación de etano o eteno en Plutón podría estar relacionada con procesos atmosféricos en lugar de superficiales. Éstos podrían darse en otros objetos como Makemake en el que también se ha demostrado la presencia de estos hidrocarburos. En la charla se analizarán propiedades físicas de estos hielos y las implicaciones de los datos de laboratorio para la interpretación de los datos observacionales y de los modelos
Speaker: Dr. Miguel Ángel Satorre Aznar (Centro de Tecnologías Físicas (Universitat Politècnica de València))
• 18:15
A spectroscopically confirmed rich proto-cluster at z ~6.5 25m Aula 2.12

### Aula 2.12

We have performed a search for Lyman Alpha sources around two spectroscopically con- firmed star forming sources in the Subaru Deep Field. Deep imaging of this field has resulted in a large number of Lyman Alpha sources potentially related to the two strong star forming sources. Deep GTC/OSIRIS multi-object spectroscopy of a selected sample of these sources has resulted in the spectroscopic detection of at least 4 sources as well as one of the two fiducial sources used as signpost for the observations. At magnitude m = 26AB, these are some of deepest spectroscopically confirmed Lyman alpha sources.
Speaker: Prof. Jose Miguel Rodriguez Espinosa (Instituto de Astrofísica de Canarias)
• 18:40
Efecto de la temperatura en la velocidad de desorción de moléculas. Implicaciones astrofísicas. 25m Aula 2.12

### Aula 2.12

Speaker: Dr. Miguel Ángel Satorre Aznar (Centro de Tecnologías Físicas (Universitat Politècnica de València))
• 15:15 20:00
Comunicación y Divulgación Aula 2.11 (Facultad de Química (USC))

### Aula 2.11

• 15:55
Convener: Enrique Arribas 5m
• 16:00
Divulgación de la Física de Materiales en Asturias: Nuestras experiencias ante diferentes audiencias 30m
En esta comunicación presentamos nuestra trayectoria de divulgación de la Física a lo largo de los últimos años en Asturias ante audiencias muy diversas, desde colegios de educación primaria y secundaria hasta centros culturales en pequeñas localidades rurales. Nuestra intención es poner en común nuestras experiencias con los participantes en el simposio y discutir acerca de la importancia de la divulgación y la comunicación para lograr que nuestra sociedad tome conciencia de la necesidad de avanzar en el conocimiento científico para mejorar el bienestar de las personas.
Speaker: Prof. Pedro Gorria (Universidad de Oviedo)
• 16:30
Clubes de ciencias: Estrategia para formar divulgadores y fomentar vocaciones 20m
La enseñanza de las ciencias como actividad orientada al fomento de las vocaciones científicas y a la educación científica, contribuye a la formación de ciudadanos críticos. La divulgación científica es una tarea de suma importancia tanto para docentes como investigadores, se realiza a través de diversos medios de divulgación, como lo son los talleres, publicaciones y ferias de ciencias. Una vía de divulgación es la formación que reciben niños y jóvenes dentro de los clubes de ciencias. Durante su estancia en estos centros de formación, los participantes logran desarrollar un conocimiento, siguiendo un procedimiento de investigación formal adecuado a su edad, que se completa con la presentación de resultados en diversos foros, entre ellos las ferias de ciencias.
Speaker: Ms. Raquel Ramirez-Vazquez (UCLM)
• 16:50
La física desde el punto de vista del estudiante de grado 20m
Speakers: Ms. Ana Catalán Benavent (Universidad de Valencia), Mr. Jose Joaquín Pérez Maciá (Universidad de Valencia)
• 17:10
Coffee break 30m
• 17:40
Divulgando la Ciencia a través de la Radio 20m
Presentamos una experiencia de divulgación de la Ciencia basada en la utilización de una emisora de radio como vehículo. Cuando acaba la programación nacional de la Cadena SER (Sociedad Española de Radiodifusión) a las 12:30 de cada día laborable, comienzan las programaciones locales que suelen cubrir hasta las 14:00, hora en la que empiezan las noticias nacionales. Dentro de esa programación local de la Cadena SER en la provincia de Albacete, los jueves a una hora indefinida entre las 13:30 y las 14:00 se emite el programa “Conciencia” que coordino.El programa comienza con los acordes de la canción “We Will Rock You” de Brian Harold May, músico británico y doctor en astrofísica, muy conocido por ser el guitarrista de la famosa banda británica Queen. La sección “Conciencia” tiene una duración aproximada de 12-14 minutos y lleva en antena desde el 8 de enero de 2015, coincidiendo con el año internacional de la luz.
Speaker: Prof. Enrique Arribas (Castilla-La Mancha)
• 18:00
Campos Electromagnéticos de Radiofrecuencia y cáncer de causas inespecíficas 30m
Se presentan los resultados de un estudio epidemiológico en el que se analizó la correlación entre la exposición a RF-EMF en la ciudad de Albacete (166.000 habitantes) y la incidencia de algunos cánceres de causas inespecíficas (linfomas y tumores cerebrales). Para ello, se analizó la exposición personal a los EMF-RF en las diferentes secciones censales de la ciudad de Albacete; se elaboró un mapa de exposición de las personas a los EMF-RF, mediante datos agregados, de la ciudad de Albacete; se estudió la posible relación entre el mapa de exposición a los EMF-RF y la ubicación de las antenas de telefonía en la ciudad de Albacete; y finalmente, mediante análisis de datos espaciales (patrones espaciales de puntos y datos agregados) se estudió la distribución y posible aleatoriedad de los casos de tumores cerebrales registrados, para analizar si existe una relación causa efecto entre los EMF-RF y dichos tumores
Speaker: Ms. Raquel Ramirez-Vazquez (UCLM)
• 18:30
Instalaciones científicas singulares en España con investigación en Física 25m
El objetivo de esta comunicación es presentar las principales instalaciones tecnocientíficas en territorio español relacionadas con la física, incluyendo, desde un punto de vista general, las diferentes líneas de investigación asociadas. En particular está enfocada para su uso por profesores de enseñanza secundaria y de universidad (principalmente para Bachillerato y primeros cursos de Ciencias Físicas), con el fin de facilitar la realización de proyectos de intervención educativa asociados al objetivo indicado. El objetivo final es fomentar tanto la vocación científica entre los alumnos de secundaria como la investigadora en los universitarios.
Speaker: Dr. Soler Ferran Pablo (RSEF)
• 15:15 19:15
Energy and Sustainability II: Workshop GEES-CIEMAT Aula Física (Facultad de Química (USC))

### Aula Física

• 15:15
WORKSHOP ALTA INTEGRACIÓN DE RENOVABLES EN SISTEMA ELECTRICO. ALMACENAMIENTO ENERGIAS DE APOYO. ESCENARIOS 2030‐2014 1h 45m
• 17:00
Coffee Break 30m
• 17:30
MESA REDONDA. ALTA INTEGRACION DE RENOVABLES EN SISTEMA ELECTRICO ESPAÑOL. ESCENARIOS (2030‐2040) 1h 45m
• 15:15 19:15
Física Médica I Aula Química Física (Facultad de Química (USC))

### Aula Química Física

• 15:15
Join Session with Nuclear Physicss 4h Aula Física (Santiago de Compostela, Facultade de Química)

### Aula Física

#### Santiago de Compostela, Facultade de Química

Same as Nuclear Physics II
• 15:15 18:15
Particle and Theoretical Physics I Aula Química Técnica (Facultad de Química (USC))

### Aula Química Técnica

Conveners: Dr. Isidro González Caballero (Universidad de Oviedo), Dr. JOSE SALT (IFIC), Dr. Santiago Gonzalez de la Hoz (IFIC)
• 15:15
Enhancement of the relic neutrino density in the Milky Way 30m
Neutrino oscillations have shown that these weakly interacting particles have a mass different from zero, although cosmology points towards smaller values for their masses than previously expected. Despite the smallness of their mass, relic neutrinos coming from the time of their decoupling might cluster under strong gravitational potentials, such as the one of our galaxy, leading to an overdensity of such neutrinos in our surroundings. This can be helpful for future experiments' aiming at detecting relic neutrinos, like PTOLEMY. I will discuss an update on the gravitational clustering of relic neutrinos in the Milky Way, showing that the expected overdensity is unfortunately lower than desired.
Speaker: Mr. Pablo Fernández de Salas (IFIC)
• 15:45
Latest improvements on nPDFs 30m
I will review the current status of the DGLAP global analysis of nuclear parton distribution functions, nPDFs. Th different nPDF sets available will be presented, focusing on the latest improvements and the next steps to be made.
Speaker: Carlota Andrés Casas (USC)
• 16:15
Search for electroweak SUSY production in the CMS experiment 30m
The measurements described in this contribution aim to study the SUSY model cases where the lightest fermionic superpartners of the SM bosons (namely, charginos and neutralinos) appear via electroweak production where the final state contains multiple leptonic particles. As many searches that target similar final states are being developed a combination effort is being developed that will be also touched in this talk.
Speaker: Mr. Carlos Francisco Erice (Universidad de Oviedo)
• 16:45
LHCb: A general purpose detector in the forward region 30m
- Introduction Located in Geneva (Switzerland), LHCb is one of the 4 big detectors of the Large Hadron Collider (LHC), the largest particle accelerator in the world, in which proton-proton collisions have been taking place since 2009 at different unprecedented energies. LHCb is a forward spectrometer whose acceptance and specific features makes it very complementary to the rest of the LHC experiments. LHCb has been able to produce many interesting measurements so far that have turned out to be very important to understand the composition and nature of matter at the most elemental scales. Examples of very well known results concerning flavor physics and spectroscopy are the first observation of the Bs→μμ decay [1], the measurement of the CP-violating phase ϕs [2] or the observation of J/ψp resonances consistent with pentaquark states [3]. However, in the last years, LHCb has been able to make relevant contributions in many other areas beyond those for which it was originally designed, a summary of which will be presented in this talk. More specifically, focus will be set on newest results and in those areas in which the author has worked more actively. These and many other results make LHCb currently a general purpose detector in the forward region. - Direct searches for light particles Several New Physics (NP) models predict the existence of particles beyond those of the Standard Model (SM) for whose detection LHCb is particularly well suited. The main reason for this is a flexible trigger, significantly softer than those of ATLAS and CMS, and the presence of unique detectors, such as RICH, which is able to provide a measurement of the mass of long lived charged particles. Among others, LHCb has searched for displaced particles decaying to jets [4] or semi-leptonically [5] as well as long-lived heavy charged particles [6]. Although no evidence for new particles has been found, these results are useful to constraint the parameter space of several NP models. - Standard Model physics The SM is currently our best approach to explain the dynamics and behavior of particles at the subatomic level. The LHCb detector allows performing several measurements to test the precision of the SM, in some cases to an unprecedented level at a hadron collider. In this regard, the LHCb measurements are very useful to constrain the internal structure of the proton measuring the Z production in the forward region [7] or to probe hard QCD in a unique environment, providing the first evidence for certain processes, such as W+cc [8]. Furthermore, LHCb is expected to make relevant contributions to Higgs physics in the mid-term. On this subject, a first search for the decays H→bb or cc, with the Higgs produced in association with a W or Z boson has already been performed [9]. - Physics with heavy ions LHCb was not initially conceived for heavy ion physics. However, following the excellent performance of the detector and the increasing interest in this area at LHCb, data has been recorded in different configurations, including Pb-Pb, p-Pb and Pb-p collisions. Furthermore, LHCb can be turned into a fixed target experiment by injecting noble gases in the collision region. These special configurations can be very useful from a physics point of view. A remarkable example is that of the measurement of the anti-production in p-He collisions [10]. The production ratio between protons and anti-protons has been measured by several astroparticle experiments since it is a sensitive probe to dark matter in the Universe. Given that the dominant uncertainty to better understand this ratio comes from the anti-proton production, the measurement of the anti-proton production cross section in p-He collisions is crucial and becomes an excellent example of the contributions that LHCb can make in this regard. - References [1] LHCb Collaboration, Observation of the rare Bs→μμ decay from the combined analysis of CMS and LHCb data; Nature 522, 68-72 (2015). [2] LHCb Collaboration, Measurement of the CP-violating phase ϕs in the decay Bs→J/ψϕ; PRL 108, 101803 (2012). [3] LHCb Collaboration, Observation of J/ψp resonances consistent with pentaquark states in Λb→J/ψKp decays; PRL 115, 072001 (2015). [4] LHCb Collaboration, Search for long-lived particles decaying to jet pairs with the LHCb Run 1 data (to appear as LHCb-PAPER-2016-065). [5] LHCb Collaboration, Search for massive long-lived particles decaying semileptonically in the LHCb detector; EPJC (2017) 77: 224 [6] LHCb Collaboration, Search for long-lived heavy charged particles using a ring imaging Cherenkov technique at LHCb; EPJC 75 (2015) 595. [7] LHCb Collaboration, Measurement of the forward Z boson production cross-section in pp collisions at √s = 13 TeV; JHEP 09 (2016) 136. [8] LHCb Collaboration, Measurement of forward tt, W+bb and W+cc production in pp collisions at √s = 8 TeV; PLB767 (2017) 110. [9] LHCb Collaboration, Search for H→bb or cc in association with a W or Z boson in the forward region of pp collisions; LHCb-CONF-2016-006 [10] LHCb Collaboration, Measurement of antiproton production in pHe collisions at √sNN = 110 GeV (to appear as LHCb-CONF-2017-002).
Speaker: Mr. Xabier Cid Vidal (USC - IGFAE)
• 17:15
Estudio del vértice Wtb en la producción y desintegración del quark top producido en el canal t en colisiones pp a 8TeV con el detector ATLAS 30m
En el LHC, los quarks top se producen principalmente en pares top-antitop. Sin embargo, también se pueden producir quarks top únicos mediante procesos electrodébiles con la presencia del vértice Wtb. Debido a la estructura V-A de éste vértice, los quarks top producidos están muy polarizados. Por tanto, la presencia de nueva física que afectara al vértice Wtb afectaría también a la polarización del quark top y del bosón W resultante de su desintegración. El análisis presentado muestra el estudio de la estructura del vértice Wtb realizado mediante la medida de observables de polarización en eventos de quarks top únicos en el canal t, producidos en colisiones protón-protón a una energía en centro de masas de 8 TeV. Los datos corresponden a una luminosidad integrada de 20.2 fb-1, registrados con el detector ATLAS en el LHC.
Speaker: Ms. Laura Barranco Navarro (ific)
• 17:45
D3-D5 theories with unquenched flavors 30m
We construct the string duals of the defect theories generated when Nf flavor D5-branes intersect Nc color D3-branes along a 2+1 dimensional subspace. We work in the Veneziano limit in which Nc and Nf are large and Nf =Nc is fixed. By smearing the D5-branes, we find supergravity solutions that take into account the backreaction of the flavor branes and preserve two supercharges. When the flavors are massless the resulting metric displays an anisotropic Lifshitz-like scale invariance. The case of massive quarks is also considered
Speaker: Mr. J. Manuel Penín (University of Santiago de Compostela)
• 15:15 19:20
Plasma Physics I Aula Química Analítica (Facultad de Química (USC))

### Aula Química Analítica

• 15:15
Welcome and presentation of the simposium; Chairperson: Prof. Francisco L. Tabarés 15m
• 15:30
ITER’s Design Physics Basis and Research Plan 50m
The ITER project’s mission is to demonstrate the scientific and technological feasibility of fusion power for peaceful purposes and the facility is now under construction at Saint Paul-lez-Durance (France). The ITER reactor is based on the tokamak concept of plasma magnetic confinement, in which the fusion (deuterium-tritium) fuel is contained in a toroidal vessel. The ITER tokamak is designed to generate 500 MW of fusion power for periods of 300 to 500 seconds with a fusion power multiplication factor, Q, of at least 10 (Q ≥10). ITER will also aim at demonstrating long fusion power production pulses, of at least 1000 seconds, with a fusion power multiplication factor of 5 and, ultimately, of approximately 1 hour duration (only limited by hardware design limits) when fully non-inductive operation is demonstrated. The paper will cover the main aspects of the ITER reactor design, construction and planned operation: a) The main features of the ITER tokamak reactor design. b) The basic physics design principles of the ITER tokamak and of the key ancillary systems required for the operational scenarios considered to achieve the project’s mission. c) The research plan from non-nuclear hydrogen and helium plasmas to nuclear operation with deuterium-tritium plasmas leading to the demonstration of high Q fusion power. This will include an in depth description of the key physics processes that need to be understood in detail and controlled for the achievements of ITER’s high Q goals including: 1) The reduction of the overall turbulent transport level to achieve the required energy confinement. 2) The control and mitigation of plasma magnetohydrodynamic instabilities, chiefly disruptions, edge localized modes and neoclassical tearing modes, etc. 3) The control of the power fluxes to the components that protect the vacuum vessel wall from the plasma and the minimization of the contamination of the plasma by impurities produced in plasma-wall interactions. 4) Heating and fuelling of the plasma by external means to ensure that the thermonuclear plasma conditions required to achieve high fusion gain are established in the tokamak. The paper will address the present understanding of these above, their implications for ITER operation and expected fusion performance, and the status of R&D on these issues for ITER, with emphasis on their unresolved aspects and possible ways to address them by new experiments, theoretical developments and simulations.
Speaker: Dr. Alberto Loarte (ITER Organization)
• 16:20
New insights into plasma physics in the stellarator TJ-II using pellet injection 20m
Pellet injection systems have recently been installed on the stellarator TJ-II. These systems allow controlled amounts of plasma fuel (hydrogen) or impurity elements (TESPEL) to be injected into the hot magnetically confined plasmas created in this heliac device. This has opened the way to new research areas in this machine. For example, core fuelling efficiency, pellet ablation and fuel deposition, as well as plasma reaction and reorganization to an instantaneous cooling and the subsequent increase in electron density. In addition, the TJ-II system also allows benchmarking of simulation codes for pellet ablation and deposition which will provide valuable input for future experiments on the recently commissioned large stellarator, the W7-X located in Greifswald, Germany.
Speaker: Dr. Kieran Joseph McCarthy (Ciemat)
• 16:40
Calculation of electron capture cross sections in ion collisions with molecules formed in plasma-wall interaction 20m
We present calculations of total cross sections for electron capture between protons and BeH molecules at collision energies between 25 eV and 10 keV. We have employed the semiclassical approximation and the sudden approximation for rotation and vibration. Our results show that the electron capture cross section is sizeable and may be relevant in plasma modelling.
• 17:00
Coffee break 20m
• 17:20
Testing Liquid Metal/Capillary Porous System Concepts as alternative solution for the Divertor target design of a Fusion Reactor in TJ-II 20m
The use of liquid metals as plasma facing components (PFCs) in a future fusion reactor has been proposed as an alternative to solid metals, such as tungsten and molybdenum among others [1]. They offer unique properties as Plasma Facing Materials for a Fusion Reactor; they are basically free from permanent damage by neutron and plasma irradiation and can be re-circulated and regenerated for lifetime and particle and heat exhaust issues. The expected advantages for the power exhaust issues, mainly arising at the divertor target at power densities of 10– 20 MWm−2, relay on the self-healing properties of liquid surfaces as well as the ability to in situ replacement of the surfaces exposed to the plasma by the effect of capillary forces (CPS design, [2]). Among the possible liquid metals (LM) presently considered as candidates for the development of an alternative solution to the Power Exhaust Handling in a future Fusion Reactor (Li, Sn, Ga), tin lithium alloys offer unique properties in terms of evaporation, fuel retention and plasma compatibility. This is the reason why this particular LM was chosen as main candidate in the US APEX project [3]. Very recently, LiSn (20-30:80-70at.%) alloys have been exposed to ISTTOK and TJ-II and very promising results on D retention and surface segregation of Li were obtained [4,5]. Motivated by these results a full campaign of comparative Li/ LiSn/Sn testing in TJ-II plasmas has been initiated. Liquid metal wetted CPS heatable electrodes have been manufactured in the Plasma Wall Interaction laboratory at CIEMAT and later exposed to TJII plasmas at different temperatures. For both solid and liquid states a negligible perturbation of the plasma has been recorded in the Li and LiSn cases, even when stellarator plasmas are particularly sensitive to high Z elements due to the tendency to central impurity accumulation. The surface temperature of the liquid metal/CPS electrodes (made of a Tungsten mesh impregnated in SnLi, Sn or Li) has been measured during the plasma pulse with ms resolution by pyrometry and the thermal balance during heating and cooling has been used to obtain the thermal parameters of the LM/CPS arrangements as well as to calculate the thickness of the film interacting with the plasma. Temperatures as high as 1100K during TJ-II plasma exposure were observed for the LiSn case and hints of sputtering-enhanced evaporation were deduced from the temperature dependence of the lithium fluxes entering the plasma. Furthermore, laboratory experiments showing a much lower hydrogen retention of SnLi compared to Li (as expected) and a secondary emission coefficient (SEE) closer to pure Li have been undertaken in order to further study the relevant properties of tin lithium alloys for their possible use as PFC in a future reactor. In this presentation a full account of the results obtained and their implications for the use of LM/CPS concepts in a future Fusion Reactor will be addressed. This research was partially financed by the Spanish “Ministry of Economy and Competitivity” under project ENE2014-58918-R. [1] R. Nygren and F.L.Tabarés , Nucl. Mater. Ener. 9 (2016) 6-21 [2] S.V.Mirnov et al. Nucl. Fusion 51 (2011) 073044 [3] M.A. Abdou et al,Fusion Eng. Des. 54 (2001) 181–247 [4] J. Loureiro et al. Fus. Eng. Des. (2017) http://dx.doi.org/10.1016/j.fusengdes.2016.12.031 [5] F. L. Tabares et al., Nuclear Materials and Energy 000 (2016) 1-6. http://dx.doi.org/10.1016/j.nme.2016.11.026
Speaker: Dr. eider oyarzabal (Fusion National Laboratory CIEMAT, Av Complutense 40, Madrid 28040, Spain)
• 17:40
TEMPERATURE DEPENDENCE OF LIQUID LITHIUM FILM FORMATION AND DEUTERIUM RETENTION ON HOT W SAMPLES BY LIDS AND TDS. IMPLICATIONS FOR FUTURE FUSION REACTORS 20m
The development of magnetic fusion reactors needs to solve the challenging power/particle exhaust issues to assure a long pulsed/steady state operation avoiding unacceptable damage to the Plasma Facing Materials (PFM’s) that would limit their useful life and the feasibility of such power plants. Although nowadays the use solid tungsten (W) components constitute the main investigated option for these requirements, there are serious concerns over their limitations, especially for the case of unmitigated heat flux and transients handling on the divertor. Liquid metal (LM) divertor concepts explore an alternative solution as their surfaces are, in principle, renewable and unscathed to permanent degradation and disintegration. Moreover, evaporation and high edge non coronal radiation (vapor shielding) can help in this task, reducing the power loads to the surrounding walls. Among LM’s, lithium (Li) is the most promising and studied material. Its employment has shown important advantages in terms of improved H-mode plasma confinement and heat handling capabilities. In such scenario, a possible combination of tungsten at the first wall and liquid Li at the divertor could be an acceptable solution, but several issues related with this material compatibility must be investigated. The co-deposition of Li and hydrogen isotopes on W components could increase the associated tritium retention and might represent an important hazard in terms of radioactive safety. In this work, the co-deposition of Li and deuterium (D) on tungsten at different surface temperature (200ºC-400ºC) has been studied by exposing W samples to Li evaporation under several D2 gaseous environments. Deuterium retention in the W-Li films has been quantified by using Laser Induced Desorption Spectroscopy (LIDS). Additional techniques as Thermal Desorption Spectroscopy (TDS), Secondary Ion Mass Spectrometry (SIMS), profilemetry and Flame Atomic Emission Spectroscopy (FAES) were implemented to corroborate the retention results and for the qualitative and quantitative characterization of the W-Li films. The results show a negligible (below the limit of detection) D uptake by the W-Li layer at Tsurface=225ºC, when it is exposed to simultaneous Li evaporation and low pressure (0.67 Pa) D2 gas exposition. Pre-lithiated samples were also exposed to higher D2 pressures (133.3 Pa) at different superficial temperatures (200ºC-400ºC). A non-linear drastic reduction in the D retention was found for increasing temperatures on the W-Li films that determined D/Li atomic ratios lower that 10-4 at 400ºC. The implication of these results in the potential implementation of this PFM’s solution is considered. Based on the experimental results, an extrapolation of the D co-deposition on W-Li first wall areas in DEMO reactor designs is performed, showing that the associated fuel retention in such hot first wall may be compatible with the tritium inventory limitations.
Speaker: Mr. Alfonso de Castro Calles (Fusion National Laboratory-CIEMAT)
• 18:00
Perturbaciones rotacionales de velocidad en flujos de Richtmyer-Meshkov 20m
Speaker: Prof. Juan Gustavo Wouchuk Schmidt (Universidad de Castilla La Mancha)
• 18:20
Estudio analítico de la Inestabilidad de Richtmyer-Meshkov para saltos arbitrarios de densidad en la superficie de contacto 20m
Speaker: Mr. Francisco Cobos-Campos (E.T.S.I. Industriales, Instituto de Investigaciones Energeticas, and CYTEMA, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain)
• 18:40
Estudio de propiedades microscópicas de plasmas de experimentos de astrofísica de laboratorio 20m
• 19:00
Dinámica de la expansión de una onda de choque producida en un sistema de alambre explosivo 20m
Dentro de los numerosos mecanismos para crear plasmas en condiciones controladas, destaca por su aparente sencillez el alambre explosivo. Consiste en una red RLC de alto voltaje que descarga toda la energía almacenada a través de un alambre metálico o conductor de manera que la corriente que circula por él, típicamente del orden de 10 kA,crea un plasma metálico en expansión, con una onda de choque previa. En este trabajo se presentan resultados experimentales sobre la dinámica de esta onda de choque.
Speaker: Mr. Gonzalo Rodríguez Prieto (ETSII - UCLM)
• 15:15 19:05
Quantum Technologies: joint symposium of the Quantum Information and Quantum and Non-linear Optics specialised groups Aula Química General (Facultad Química (USC))

### Aula Química General

• 15:15
Conexión de iones en distintas trampas mediante corrientes inducidas 20m
• 15:35
Fast and Robust Phase Gates with Trapped-Ion Hyperfine Qubits 20m
I will present a proposal for generating fast and robust quantum phase gates between two microwave-driven hyperfine ions, making use of a pulsed dynamical decoupling protocol. The scheme consists of a series of pi-pulses that are applied individually to each ion, whose internal level act as a qubit. Unlike previous proposals, this gate uses both axial vibrational modes as the quantum bus between both qubits. In this way, we are able to achieve a higher gate speed. In addition, I will argue that the proposed gate is robust against most harmful noise sources, related with fluctuations of the Rabi frequency or the magnetic field. Our numerical simulations show that with state-of-the-art ion trap technology, entangling gates with fidelities above 99.9% can be produced in tens of microseconds.
Speaker: Mr. Iñigo Arrazola (University of the Basque Country)
• 15:55
Quantum Walking the number of quanta probability distribution 20m
We present schemes based on the alternation between Jaynes-Cummings (JC) and anti-JC Hamiltonians for implementing quantum walks along the number of quanta " line", i.e., which provides new means for quantum state manipulation
Speaker: Prof. Eugenio Roldán Serrano (Universitat de Valencia)
• 16:15
Quantum-enhanced Landauer erasure and storage of a molecular magnetic bit 20m
The erasure of a bit of information encoded in any physical system is an irreversible operation bound to dissipate an amount of energy Q = kBT ln 2 [1]. As a result, work W ≥ Q has to be applied to the physical system to restore the erased information content [2-4]. This limit, called Landauer limit, sets a minimal energy dissipation inherent to any classical computation. In the pursuit of the fastest and most efficient means of computation, the ultimate challenge is to produce a memory device executing an operation as close to this limit in the shortest time possible. Here, we use a single crystal of Fe8 molecular nanomagnets as a spin-memory device. Each molecular cluster carries a net spin S = 10 and possesses a strong uniaxial magnetic anisotropy. The ground state corresponds to maximum spin projections Sz = +10 and -10 along the anisotropy axis, common to all molecules, which define the ‘0’ and ‘1’ bit states (Fig. 1(a)). These states are separated by an energy barrier U/kB ≈ 24 K, which hinders the spin flip and gives rise to magnetic hysteresis, thus magnetic memory, below approximately 1.2 K [5,6]. In our experiments, the Landauer cycle is performed, at T = 1 K, via the application of a sequence of magnetic fields aligned along different orientations with respect to the magnetic anisotropy axis (Fig. 1(b)). The erasure is induced by a transverse magnetic field Hy, which reduces the height of the magnetic energy barrier and promotes tunneling between quasi-degenerate spin projections, thus exploiting a form of quantum annealing [7,8]. The bits are then recorded by applying a magnetic field Hz along the anisotropy axis, strong enough to polarize their magnetic moments. The cycle is then completed by reducing first Hy and then Hz back to zero. The magnetic susceptibility along z and y has been measured (Fig. 1(c)) and then integrated to obtain the net magnetic work required to perform the erasure and recording cycle. It agrees, within experimental uncertainties, with the Landauer limit. The ac susceptibility provides also information about the magnetization dynamics and, in particular, enables us to estimate the time needed to record each bit. This time turns out to be shorter than 0.1 micro-seconds thanks to the very fast quantum spin dynamics induced by the transverse magnetic field. The performance of our device in terms of energy-time cost is then orders of magnitude better than that of any existing memory devices to date. Acknowledgments The research reported here was supported by the Spanish MINECO (grant MAT2015-68204-R), the Dutch Organization for Fundamental research (NWO/FOM), the Gobierno de Aragón (grant E98-MOLCHIP) and the European Union (advanced ERC grant Mols@Mols and COST 15128 Molecular Spintronics project). References [1] R. Landauer, IBM Journal of Research and Development 5 (1961) 183. [2] C. H. Bennett, International Journal of Theoretical Physics 21 (1982) 905. [3] C. H. Bennett, IBM Journal of Research and Development 32 (1988) 16. [4] H. Leff and A. Rex, Maxwell's demon: Information, entropy, computing, Hilger and Princeton Univ. Press, Europe/USA (1990). [5] W. Wernsdorfer, R. Sessoli, A. Caneschi, D. Gatteschi and A. Cornia, EPL 50 (2000) 552. [6] E. Burzurí, F. Luis, O. Montero, B. Barbara, R. Ballou, and S. Maegawa, Phys. Rev. Lett. 111 (2013) 057201. [7] J. Brooke, D. Bitko, T. F. Rosenbaum and G. Aeppli, Science 284 (1999) 779. [8] E. Burzurí, F. Luis, B. Barbara, R. Ballou, E. Ressouche, O. Montero, J. Campo, and S. Maegawa Phys. Rev. Lett. 107 (2011) 097203.
Speaker: Dr. Fernando LUIS (Instituto de Ciencia de Materiales de Aragón, CSIC)
• 16:35
Characterising multi-photon quantum interference with decoy-state techniques 20m
Correct characterization of general linear optical networks is becoming a promising task due to the continuous development in some fields as quantum computation and quantum communications, in which quantum optics is typically involved. Specifically, it is of great importance in several applications to know the photon number statistics at the outputs of the linear network as a function of the input photon number to check its quality. Although in recent years there have been some advances in multi-photon sources and photon number resolution a simple plug-and-play method for characterising general linear optics networks with enough accuracy is still missing. We propose a simple and practical method to estimate these photon number statistics that can be implemented with laser sources that generate quantum signals which are diagonal in the Fock basis in combination with threshold single-photon detectors.
Speaker: Mr. Álvaro Navarrete Rodríguez (Universidad de Vigo)
• 16:55
Coffee break 30m
• 17:25
Causality in waveguide QED 20m
Causality is one of the most fundamental principles in physics and it has strong implications. For instance, in QFT, the scattering matrix, the mathematical object connecting input and output free states, must follow the so-called cluster-decomposition principle, which says that the scattering amplitude factorizes as a product of single-particle amplitudes for causally disconnected input states. In this work, we find that the cluster-decomposition principle also occurs in a non-causal system: the nonrelativistic scenario of waveguide QED, where a one-dimensional photonic field interacts with some scatterers. We first show a Lieb-Robinson-like bond holds for the free theory, so the system is approximately causal if there are not scatterers. We then show that the ground state of the full model is equivalent to the vacuum far away from the scattering region, so we can properly define free input and output states. We then show the Lieb-Robinson-like bond also holds for the full system. Lastly, considering that there are more stable states apart from the ground state, we show that the scattering amplitude for a bunch of causally disconnected incident photons is composed by a product of one-photon amplitudes, with a sum over all the stable states, so the cluster-decomposition principle holds. We find the structure for the S-matrix in position space compatible with this scattering amplitude. We finally illustrate our results with two examples: (i) a two-level system ultrastrongly coupled to a dispersive medium and (ii) a general scatterer coupled to a waveguide with linear dispersion relation. In the first example, we show the cluster properties hold. In the second one, we find the structure for the S-matrix in momentum space and compute how the photon-photon correlations generated by this S-matrix decay with the distance between the incident photons.
Speaker: Mr. Eduardo Sánchez-Burillo (Instituto de Ciencia de Materiales de Aragón (CSIC-Unizar))
• 17:45
Single-atom edgelike states via quantum interference 20m
Recent theoretical and experimental studies have shown that it is possible to simulate artificial magnetic fields with ultracold atoms in optical lattices [1]. In particular, the possibility to implement chiral, topologically protected edge states analogous to those found in the context of quantum Hall physics has been demonstrated both for fermionic and bosonic atoms [2,3]. In this work, we propose an alternative strategy to implement robust edgelike states (ELS) in optical ribbons, which we model by regarding each of the sites as a two-dimensional harmonic trap of equal frequency, with a single atom carrying l = 0 or l = 1 orbital angular momentum (OAM) units. First, we consider a system of three in-line sites governed by tunneling dynamics, which can be described by a few-state model. We show that in this system quantum interference effects give rise to spatial dark states (SDS), i.e., states in which one site remains unpopulated along the time evolution. Then, we show that by using the SDS as basic building blocks, global ELS can be created in arbitrarily large ribbons. These ELS are very robust against defects in the ribbon and perturbations in the phase differences between the local eigenstates of the sites required to have quantum interference [3]. For the l = 0 case, the tunneling amplitudes between sites are always real and interference effects are solely induced by phase differences between the populated sites. This fact allows one to create ELS within this manifold and switch between them in a very straightforward manner by applying laser pulses, as shown in the left panel of figure 1, and also opening the possibility to implement similar ELS in more complex geometries. For the l = 1 case, the few-state description is richer because the tunneling amplitudes depend both on the spatial localization and the winding number of the local states, and they may become complex depending on the relative position of the sites [4]. The ELS implemented in this manifold can display global chirality, as shown in the right panel of figure 1. Another interesting possibility that this manifold offers is to simulate an extra dimension by regarding the winding number as a synthetic dimension.
Speaker: Mr. Gerard Pelegrí (Universitat Autònoma de Barcelona)
• 18:05
Measurement-Device-Independent Quantum Key Distribution with Information Leakage 20m
Measurement-device-independent quantum key distribution (MDI-QKD) is proposed to remove all the detection side-channels in quantum communication systems. In recent years, MDI-QKD has been proven to be secure with certain assumptions and become a significant step toward the practicality of QKD systems. However, the assumption that there is no information leakage from the security zones of the legitimate parties seems very difficult to be guaranteed in practice. In this work we relax this assumption by proposing a general formalism to prove the security of MDI-QKD in the presence of information leakage. Particularly, we analyze a specific Trojan-Horse attack on the intensity modulator and phase modulator and the secure key rates under different amounts of information leakage are calculated in several practical cases. Our work provides an essential reference for experimentalists to ensure the security when implementing MDI-QKD protocols in the presence of information leakage.
Speaker: Mr. Weilong Wang (University of Vigo)
• 18:25
Nanoscale control of antenna-coupling strength g for bright single photon sources 20m
Cavity QED is the art of enhancing light-matter interaction of photon emitters in cavities, with opportunities for sensing, quantum information and energy capture technologies. To boost emitter-cavity interaction, i.e. coupling strength 𝑔, ultrahigh quality cavities have been concocted yielding photon trapping times of µs to ms. However, such high-Q cavities give poor photon output, hindering applications. To preserve high photon output it is advantageous to strive for highly localised electric fields in radiatively lossy cavities. Nanophotonic antennas are ideal candidates combining low-Q factors with deeply localised mode volumes, allowing large 𝑔, provided the emitter is positioned exactly right inside the nanoscale mode volume. Here, with nanometre resolution, we map and tune the coupling strength between a dipole nanoantenna-cavity and a single molecule, obtaining a coupling rate of 2𝑔max = 412 GHz. Together with accelerated single photon output, this provides ideal conditions for fast and pure non-classical single photon emission with brightness exceeding 10E9 photons/sec. Clearly nanoantennas, acting as “bad” cavities, offer an optimal regime for strong coupling 𝑔, to deliver bright on-demand and ultrafast single photon nanosources for quantum technologies.
Speaker: Prof. Niek F. van Hulst (ICFO - the Institute of Photonic Sciences)
• 18:45
Bichromatically driven Kerr-like cavities and vacuum squeezing generation. 20m
Here we theoretically analyse the generation of strong vaccum squeezing in optomechanical, superconducting circuits and polariton cavities driven by a bichromatic field . This proposal has the following advantages over the usual proposals with mochromatic driving: the process is unrelated to bistability which is good for stability issues and the reduction of fluctuations takes place at a non-injected frequency, thus one obtains a squeezed vacuum state
Speaker: Mr. Rafael Garcés Malonda (Departament d'Òptica, Universitat de València)
• 19:30 20:30
Plenary: outreach Aula Magna

### Aula Magna

#### Santiago de Compostela, Facultade de Química

Av. das Ciencias s/n, 15701 Santiago de Compostela, A Coruña, Spain
• 19:30
La teoría de la evolución y sus implicaciones: ¿una verdad incómoda? 1h
La teoría de la evolución y sus implicaciones: ¿una verdad incómoda?
Speaker: Prof. José Adolfo de Azcárraga Feliu (IFIC)
• Wednesday, 19 July
• 09:00 13:40
Plenary III Aula Magna

### Aula Magna

#### Santiago de Compostela, Facultade de Química

Av. das Ciencias s/n, 15701 Santiago de Compostela, A Coruña, Spain
• 09:00
New frontiers in superconductivity: Novel states and properties from topology and interfaces 50m
More than 100 years have passed since the discovery of superconductivity. In the meantime this fascinating phenomenon has provided the basis for a wide range of important applications. Our fundamental understanding of superconductivity has been based on the theory of Bardeen, Cooper, and Schrieffer known as BCS which was published in 1957. Despite being a well-established field in quantum matter physics, superconductivity has been a continuous source of new discoveries during the past decade. The discoveries have been made possible by the progressive technical mastery of producing artificially structured quantum matter with tunable properties. Surfaces and interfaces play a key role in this context. On the theory side, "topology" emerged as a pervasive concept in characterizing and classifying novel states of quantum matter with fascinating and sometimes exotic properties. In the present talk I will review some recent developments and ideas which may give rise to opportunities for scientific discovery and potential applications.
Speaker: Prof. Gertrud Zwicknagl
• 09:50
Nanocosmos and Laboratory Astrophysics: from molecules to dust 50m
Evolved stars are the factories of interstellar dust. This dust is injected into the interstellar medium and plays a key role in the evolution of astronomical objects from galaxies to the embryos of planets. However, the processes involved in dust formation and evolution are still a mystery. The increased angular resolution of the new generation of large telescopes, is providing for the first time a detailed view of the conditions in the dust formation zone of evolved stars, as shown by our first observations with ALMA (Cernicharo et al. 2013, Agúndez et al. 2017). The aim of the NANOCOSMOS project is to take advantage of these new observational capabilities to change our view on the origin and evolution of dust grains. We are combining astronomical observations, modelling, and top-level experiments to produce star dust analogues in the laboratory and identify the key species and steps that govern their formation. We have built two innovative setups: the Stardust chamber to simulate the physical conditions of the atmosphere of evolved stars, and the gas evolution chamber to identify novel molecules in the dust formation zone. We are also improving existing laboratory setups and combine different techniques to achieve original studies on individual dust grains, their processing to produce complex polycyclic aromatic hydrocarbons, the chemical evolution of grain precursors and how dust grains interact with abundant astronomical molecules. Our simulation chambers have been equipped with state-of-theart in situ and ex situ diagnostics. Our astrophysical models, improved by the interplay between observations and laboratory studies, provide powerful tools for the analysis of the wealth of data provided by the new generation of telescopes. The synergy between astronomers, vacuum and microwave engineers, molecular and plasma physicists, surface scientists, and theoreticians in NANOCOSMOS is the key to provide a cutting-edge view of cosmic dust.
Speaker: Prof. José Cernicharo
• 10:40

Entrega de Diplomas y premios para los ganadores del Concurso Jóvenes investigadores

• 10:50
Cloaking magnetic information 20m
During the last decade, in the field of multiferroic materials, several systems have shown the coexistence of electric and magnetic orders with coupling between them (so-called magnetoelectric coupling). In the particular class of composite multiferroics, where magnetoelectric coupling takes place owing to mechanical coupling (strain mediated) between a ferroelectric material and a ferromagnetic material, the sign of the net magnetization in the ferromagnet can not be selected uniquely by an electric field, whatever is its sign or magnitude. This is because piezoelectricity and magnetostriction (the mechanisms that trigger magnetoelectric coupling) are both even functions of electric field and strain, respectively. Without overcoming this fundamental issue, we will show by micro and macromagnetic characterization that magnetic memory effects present in the antiferromagnetic to ferromagnetic transition of FeRh can help to circumvent it. With this purpose, we have characterised a PMN-PT/FeRh structure. PMN-PT is a relaxor ferroelectric with record piezoelectric coefficient, and FeRh presents a large change in its lattice parameters while crossing the antiferromagnetic to ferromagnetic phase transition. Thus, one can tune the magnetic order by means of electric-field, by modifying the magnetic transition temperature on FeRh via strain coupling between the piezoelectric substrate and the magnetic layer. First, we will show that FeRh phase transition shows thermal memory effect. After the FeRh magnetization is oriented in the ferromagnetic phase by an external magnetic field and FeRh is brought to the antiferromagnetic phase by cooling it, if one measures the orientation of the magnetization again in the ferromagnetic phase, it partially recovers its initial state [1]. Secondly, we also show that by the application of low electric field, we can isothermally manipulate a large amount of magnetization. Magnetic imaging reveals that the electrically stimulated memory effect occurs thanks to the same mechanism that applies for the aforementioned thermal magnetic memory effect [2], as sketched in Figure 1. [1] J. Clarkson, …, I. Fina, et al., An invisible non-volatile solid-state memory, arXiv preprint arXiv:1604.03383 [2] I. Fina, et al., Electric-Field Adjustable Time-Dependent Magnetoelectric Response in Martensitic FeRh Alloy, ACS Applied Materials & Interfaces (2017). Online.
Speaker: Dr. Ignasi Fina (Institut de Ciència de Materials de Barcelona (ICMAB-CSIC))
• 11:10
Coffee break and poster session 30m
• 11:40
Transversal Session II. Física para todos: Divulgación de la Física 2h
Física para todos: Divulgación de la Física
Speakers: Dr. Carmen Carreras (RSEF - UNED), Jorge Mira, Prof. Miguel-Angel Sanchis-Lozano (University of Valencia)
• 13:40 15:00
Lunch break 1h 20m Campus Vida USC

#### Campus Vida USC

• 15:00 19:45
Nuclear Physics III Aula Física Química (Facultad de Química (USC))

### Aula Física Química

• 15:00
El laboratorio TRAPSENSOR: Un laboratorio singular de la Universidad de Granada 25m
• 15:25
Caracterización de un ion de 40Ca+ enfriado por láser como detector en experimentos de espectrometría de masas de alta precisión 15m
• 15:40
Development of an ultrafast X-ray laser-plasma source 15m
We report the development of a fast rotating target system to produce ultrashort incoherent X-ray pulses from Bremsstrahlung. These ultrashort X-ray pulses are produced in the laser-plasma interaction of solid metallic targets with 35fs, 1mJ pulses centered at 800nm of a 1kHz repetition rate Ti:sapphire laser. We describe the experimental issues of the system such as the stability of the rotatory target or laser focusing with a small Rayleigh length (<20μm) which can modify the laser intensity on target and change the characteristics of the X-ray source. We also report the X-ray spectra analysis of different metallic targets. We observe the X-ray source has a broad Maxwellian-like distribution with temperatures of around 10–120keV. These kind of X-ray sources could be used for advanced X-ray imaging such as absorption or phase contrast tomography.
Speaker: Mrs. Lucía Martín (Universidad de Santiago de Compostela)
• 15:55
Preliminary Results on 64Se beta decay experiment at RIKEN Nishina Center 15m
Spin-isospin excitations can be studied by beta decay and charge exchange reactions in mirror nuclei, shedding light on mirror symmetry, hence we can compare our results on the beta decay of proton-rich nuclei with the results of charge exchange experiments when appropriate targets for the mirror nuclei are available [1]. Accordingly we have performed experiments at GSI and GANIL to study Tz =-1 [2] and Tz =-2 [3,4] nuclei respectively where it became clear that the study of heavier, more exotic systems, demands beam intensities available only at the RIKEN Nishina Center. In this work we present the first experimental observation of the beta-delayed protons in the decay of the Tz =-2 64Se.
Speaker: Mr. Pablo Aguilera (Instituto de Física Corpuscular de Valencia)
• 16:10
Medida de vidas medias de estados excitados en los núcleos 136Te y 137Te en la campaña EXILL-FATIMA 15m
• 16:25
Línea de neutrones en el CNA 15m
La física de neutrones experimental juega un papel fundamental en diversos campos como física de materiales, tecnología nuclear, astrofísica y física médica. En el CNA nos hemos propuesto desarrollar una línea de neutrones versátil capaz de producir haces de neutrones para diferentes aplicaciones. Así hemos proporcionado neutrones térmicos (
Speaker: Mr. Miguel Macías Martínez (CNA (Centro Nacional de Aceleradores), Univ. Sevilla)
• 16:40
DENSITY DEPENDENCE OF THE SYMMETRY ENERGY FROM NEUTRON SKIN THICKNESS, PARITY-VIOLATING ELASTIC ELECTRON SCATTERING AND ELECTRIC DIPOLE POLARIZABILITY 20m
The nuclear symmetry energy J is an essential quantity in nuclear physics and astrophysics because it governs important properties of small entities like atomic nuclei and of very large objects as neutron stars. The nuclear symmetry energy represents the energy cost of changing protons in neutrons in symmetric nuclear matter. The symmetry energy can be estimated as a function of the density as the difference between the energy per particle in pure neutron matter and in symmetric nuclear matter. The behaviour of the symmetry energy as a function of the density is basically ruled by the its slope respect to the density computed at saturation L. Although the symmetry energy and its slope are not strictly observables, many different experiments have been devised to estimate these quantities using strong and electromagnetic probes [1]. We will discuss here our predictions of the symmetry energy and its slope obtained from three different experiments. First, we estimate the slope of the symmetry energy L from experimental data of the neutron skin thickness extracted from antiprotonic atoms [2-5]. Second, we discuss the ability of parity-violating elastic electron scattering at low momentum transfer to obtain information on the neutron skin thickness in 208Pb and to constraint the density dependence of the nuclear symmetry energy [6-7]. Finally, we compare the experimental electric dipole polarizability obtained via polarized proton inelastic scattering at forward angles in 208Pb, 120Sn and 68Ni [8,9] with the corresponding theoretical RPA calculations, which allow to estimate the symmetry energy J and its slope L. All these experiments provide different constraints on the slope L of the symmetry energy but the corresponding values have a considerable overlap in a range around , in reasonable agreement with other estimates that use different observables and methods to extract L. A global review about our work on these three topics can be found in Refs [10,11]. Referencias [1]. Bao-An Li, Xiao Han, Phys. Lett. B727 (2013) 276. [2]. M. Centelles, X. Roca-Maza, X. Viñas, M. Warda, Phys. Rev. Lett. 102 (2009) 122502 . [3]. M. Warda, M. Centelles, X. Roca-Maza, X. Viñas, Phys. Rev. C80 (2009) 024316. [4]. M. Warda, M. Centelles, X, Roca-Maza, X. Viñas, Phys. Rev. C81 (2010) 054309. [5]. M. Warda, M. Centelles, X. Viñas, X. Roca-Maza, Phys. Rev. C89 (2014) 064302 . [6]. M. Centelles, X. Roca-Maza, X. Viñas, M. Warda, Phys. Rev. C82 (2010) 054314. [7]. X. Roca-Maza, M. Centelles, X. Viñas, M. Warda, Phys. Rev. Lett. 106 (2011) 252501. [8]. X. Roca-Maza et al, Phys. Rev. C88 (2013) 024316 . [9]. X. Roca-Maza et al, Phys. Rev. C92 (2015) 064304 . [10]. X. Viñas, M. Centelles, X. Roca-Maza, M. Warda, Eur. Phys. J. 50 (2014) 27 . [11]. X. Viñas, M. Centelles, X. Roca-Maza, M. Warda, AIP Proceedings 1606 (2013) 256.
Speaker: Prof. Xavier Viñas (Universitat de Barcelona)
• 17:00
Coffee Break 30m
• 17:30
Medidas de secciones eficaces de fisión con Medley en GANIL-NFS 15m
Las secciones eficaces de fisión inducida por neutrones en los isótopos 235U y 238U se consideran estándar y, por ello, se utilizan ampliamente en medidas de flujo de neutrones. Con el objetivo de mejorar la precisión de dichos estándares y, en consecuencia, de las medidas de datos nucleares que las utilizan como referencia, estamos preparando una nueva medida experimental que relacione las secciones eficaces de dichas reacciones con la de la dispersión elástica neutrón-protón. En esta comunicación, se presentará el dispositivo experimental, basado en el uso de PPACs para detectar los fragmentos de fisión, y de detectores de silicio y cristales centelleadores para detectar los protones dispersados, y que planeamos usar en la instalación Neutrons For Science (NFS) que se está construyendo en GANIL (Francia).
Speaker: Dr. DIEGO TARRIO VILAS (UPPSALA UNIVERSITY)
• 17:45
Radiative neutron capture on 242 Pu in the resonance region at n_TOF-EAR1 15m
The spent fuel of current nuclear reactors contains fissile plutonium isotopes that can be combined with 238U to make mixed oxide (MOX) fuels [1]. In this way the Pu from spent fuel is used in a new reactor cycle, contributing to the long-term sustainability of nuclear energy. The use of MOX fuels in thermal and fast reactors requires accurate capture and fission cross sections. For the particular case of 242Pu, there are sizable discrepancies among the cross section measurements available [2-5] all from the 70s, resulting in and uncertainty of 14% and 35 % below and above 2 keV, respectively. In this context, the Nuclear Energy Agency (NEA) recommends in its High Priority Request List (HRPL) [6] and its report WPEC-26 [7] that the capture cross section of 242Pu should be measured with an accuracy of at least 8-10% in the neutron energy range between 500 eV and 500 keV. This work presents the time-of-flight capture measurement on 242Pu, carried out at n_TOF-EAR1 (CERN) [8] featuring a white neutron beam with energies ranging from thermal to GeV. The 242Pu(n,γ) reaction on a sample containing 95 mg of extremely pure 242Pu was measured with an array of 4 C6D6 Total Energy Detectors [9]. This contribution focuses on the analysis and results in its resonance region. In this context, the unique energy resolution feature by the n_TOF-EAR1 facility has enabled to resolve, analyze and extract individual resonance parameters for more than 250 s- and p-wave resonances up to 4 keV, 180 of which are not present in JEFF 3.2. Moreover, the achieved systematic uncertainty in the capture cross section is around 4%, fulfilling the requirements of the NEA-HPRL. Last, the statistical properties of the resonances have been studied in terms of their average resonance parameters and compared to the predictions of theoretical models. A detailed version of this work can be found in Ref. [10]. Acknowledgments We acknowledge the n_TOF Collaboration. This measurement has received funding from the EC FP7 Programme under the projects NEUTANDALUS (Grant No. 334315) and CHANDA (Grant No. 605203), the Spanish Ministry of Economy and Competitiveness projects FPA2013-45083-P and FPA2014-53290-C2-2-P and the V Plan Propio de Investigación Programme from the University of Sevilla. References [1] IAEA, Status and advances in Mox fuel technology, IAEA Technical Reports Series 415 (2003) [2] F. Poortmans et al., Nucl. Phys A 207, 342-352 (1973) [3] R.W. Hockenbury et al., SP 425, 584-586 (1975) [4] K. Wisshak and F. Kaeppeler, Nucl. Sc. and Eng. 66, 363 (1978) [5] K. Wisshak and F. Kaeppeler, Nucl. Sc. and Eng. 69, 39 (1979) [6] NEA High Request Priority List http://www.nea.fr/dbdata/hprl [7] M. Salvatores and R. Jacqmin, Uncertainty and target accuracy assessment for innovative system using recent covariance data evaluations, ISBN 978-92-64-99053-1, NEA/WPEC-26 (2008) [8] C. Guerrero et al., Eur. Phys. J. A 49, 27 (2013) [9] R.Plag et al., Nucl. Instrum. and Meth. A 496, 425436 (2003) [10] J. Lerendegui, C. Guerrero et al., Phys. Rev. C (2017) (submitted)
Speaker: Mr. Jorge Lerendegui Marco (Universidad de Sevilla)
• 18:00
Neutron capture cross-section measurement of 203,204Tl and its astrophysical implications 15m
About half of the elemental abundances between Fe and Bi are produced by the so-called s (slow) process of neutron capture reactions in AGB stars. Of particular importance are some nuclides produced during the s-process which are radioactive, with half-lives from years to Gy, so its decay process competes with the neutron capture chain: these nuclides are known as branching points. The measurement of the neutron capture cross section of these elements is crucial to determine the local abundance pattern around the branching point, which yields information of the s-process stellar environment, such as temperature, neutron density or pressure. 204Tl (T1/2=2.78 y) is a very interesting branching point. In the recurrent He-flashes of AGB stars, 204Tl can either β-decay to the s-only nuclide 204Pb or capture another neutron, thus producing 205Tl. which in some stellar environments can decay to 205Pb. On the other hand, neutron capture on 204Pb also yields 205Pb (T1/2=1.5×107 y). Therefore, the value of the 204Tl capture cross section is necessary to determine precisely the primordial 205Pb/204Pb abundances ratio, which would allow one to estimate the time span since the last s-process events that contributed to the elemental composition of the Solar System. In the year 2015, the cross section of the 204Tl(n,γ) reaction was measured for the first time ever employing four C6D6 scintillation detectors in the neutron time-of-flight facility n_TOF at CERN. The sample was a 203Tl oxide pellet enriched to 4% in 204Tl. The 204Tl total mass was 9 mg, with a total activity of 160 MBq. In this talk several aspects of this capture cross section measurement will be covered, from the experimental methods and the extraction of the cross section and other important capture reaction parameters, to the final application of the results on s-process nucleosynthesis.
• 18:15
PREMIOS ATI 25m
Speaker: Mrs. Marta Trueba
• 18:40
ASAMBLEA FNUC 20m
• 15:00 19:20
Plasma Physics II Aula Química Analítica (Facultad de Química (USC))

### Aula Química Analítica

• 15:00
Chairperson: Dra. Nerea Bordel 5m
• 15:05
Electrical discharges in the upper atmosphere of the Earth and other planets of the Solar System 50m
In this contribution, we will present an overview of the kinetic and spectroscopic aspects of the research done in our group on atmospheric electricity in planetary atmospheres. In particular, we will describe our efforts towards the understanding of lightning-driven upper atmospheric electrical discharges in the Earth, the giant planets (Saturn and Jupiter) and on Venus where the existence of lightning is still nowadays controversial since no direct optical recording of lightning is yet available though there are a number of indirect (radio emissions) results suggesting that some kind of electrical atmospheric activity could exist in Venus. In the case of the Earth, we will focus on the so called Transient Luminous Events (TLEs), which are a diversity of weakly ionized low temperature plasmas occurring in the upper atmosphere of the Earth between the thundercloud tops (15 km) and the lower ionosphere (95 km). These upper atmospheric plasmas were recorded for the first time 28 years ago (in the summer of 1989) and their occurrences are linked to the electrical (lightning) activity in the Earth troposphere (0 - 15 km). Our research tries to answer questions such as, what are the chemical and electrical impacts of TLEs in the Earth atmosphere What are the physical (kinetic and electrodynamic) mechanisms underlying the ignition of TLEs?. What are the key spectroscopic features of TLE optical emissions, how can they be detected and what can we learn by analyzing TLE optical spectra?.
Speaker: Dr. Francisco J. Gordillo Vázquez (Instituto de Astrofísica de Andalucía (IAA - CSIC))
• 15:55
Study of transient lightning-driven discharges in the upper atmosphere of the Earth, Venus and giant gaseous planets 20m
The electromagnetic field created by terrestrial lightning discharges has a chemical and an electrical impact in the plasma existent in the upper atmosphere, producing Transient Luminous Events (TLEs). Since their discover in year 1989, terrestrial TLEs have been investigated in an effort to determine their chemical impact in the upper mesosphere. In addition, the detection of possible extraterrestrial TLEs have been proposed as a tool to study lightning beyond our planet. Difficulties inherent in the study and observation of the natural plasma located in the lower ionosphere give value to the development of models. We extend previous models of the impact of quasi-electrostatic field (QE) in the terrestrial mesosphere produced by cloud-to-ground (CG) lightning discharges, providing the community with new tools to interpret observations from spacecraft. In addition, we use a Finite Difference Time-Domain (FDTD) model to investigate possible TLEs existence in the atmosphere of giant planets caused by lightning-emitted electromagnetic pulses (EMP). Finally, we apply these models to the case of Venus to investigate the mesospheric optical signature produced by hypothetical Venusian intra-cloud (IC) lightning, proposing an indirect method to determine the existence of lightning discharges in Venus from the Japanese spacecraft Akatsuki, orbiting Venus since December 2015.
Speaker: Mr. Francisco Javier Pérez Invernón (Instituto de Astrofísica de Andalucía (IAA), CSIC)
• 16:15
Fluid model for the streamer-to-leader transition in lightning channels. 20m
One of the still not well understood phenomena involved in electric discharges is the streamer-to-leader transition. Here, as a first approach to investigate this transition, we present our recent steps modelling heating and gas expansion produced in streamer discharges, coupled to electromagnetic and air plasma chemistry. So far, we have applied this model to the mechanism of air heating and pressure perturbations present in sprite discharges, without losing sight of our final aim, i.e., to disentangle the streamer-to-leader transition in lightning channels.
Speaker: Mr. Alejandro Malagón (Instituto de Astrofísica de Andalucía - CSIC)
• 16:35
Coffee break 30m
• 17:05
Limpieza y activación de superficies de aluminio mediante postdescargas de plasmas de microondas generadas a presión atmosférica 20m
• 17:25
Influencia del diámetro de cátodo en la caída del campo eléctrico en descargas de cátodo hueco en hidrógeno 20m
Los plasmas a baja presión generados en régimen de glow-discharge son objeto de interés debido a sus múltiples aplicaciones, tanto en la industria como en la investigación (procesado de materiales, deposición de películas delgadas, espectroscopia, etc.). Todas estas aplicaciones requieren un profundo conocimiento del comportamiento del plasma, que puede ser estudiado tanto de manera teórica como experimental [1-4]. En el Laboratorio de Espectroscopia Láser de la Universidad de Valladolid se realizan medidas de la caída del campo eléctrico en la zona de cátodo en este tipo de descargas, puesto que esta magnitud determina en gran medida las condiciones generales de la descarga (flujo de partículas, densidades de carga, etc.). En este trabajo se presentan las medidas realizadas en una descarga de cátodo hueco en régimen glow-discharge de hidrógeno puro, con cátodos de tungsteno de 10 y 15 mm de diámetro interior. Las medidas se realizan con la misma densidad de corriente lo que permite estudiar la influencia del diámetro en la descarga.
• 17:45
Descargas luminiscentes pulsadas como fuente de ionización de compuestos orgánicos volátiles 20m
Speaker: Mr. Jonatan Fandiño Rodríguez (Universidad de Oviedo)
• 18:05
General Meeting of the Grupo Especializado de Física de Plasmas 1h
• 15:15 19:15
27º Encuentro Ibérico de Enseñanza de la Física III: simposium conjunto con Enseñanza, Divulgación e Historia de la Física Aula Biología (Facultad de Química (USC))

### Aula Biología

• 15:15 19:15
Energy and Sustainability III Aula Física (Facultad de Química (USC))

### Aula Física

• 15:15
Efecto termoeléctrico en líquidos: Moviendo iones 30m
Speaker: Mr. Jesus Garcia Ojero (Grupo MIRE, Departamento de Fisica de Materiales, Facultad de Ciencias UAM)
• 15:45
Preparación y caracterización de membranas híbridas Nafion®/hidróxido doble laminar (LDH) con sepiolita para aplicación en pilas de combustible 30m
• 16:15
Finite Element Analysis of Nanopores in Capacitive Energy Extraction Based on Double Layer Expansion (CDLE) 30m
Capacitive energy extraction based on double layer expansion (CDLE) is a new method devised for extracting energy from the exchange of fresh and salty water in porous electrodes. First suggested by D. Brogioli, it is enclosed in a group of emergent technologies jointly known as Capmix methods. The CDLE technique is based on the fact that the capacitance of the electric double layer (EDL) strongly depends on the ionic contents of the medium. If a metal/solution interface is externally charged in the presence of high ionic strength, and discharged in low ionic strength, it might be possible to obtain a net amount of energy. In order to increase the charge transfer, electrodes made of micro- or nano-porous carbon particles can be used because of their huge surface area. The behaviour of the fluid flow field, the electric potential field and the ionic distributions inside the nanopores during an entire CDLE cycle must be correctly determined to gain a complete understanding of the physics involved and to optimize the energy extraction per cycle. We have performed a finite element analysis that computes the time-dependent full coupling between the Navier-Stokes, the Poisson and the mass transport (diffusion, convection and electromigration of ions) equations. From the numerical solutions, we have been able to obtain the relevant time scales of the processes that take place inside the nanopores and to compare them with experimental results. As an example, the figure shows the time evolution of the ionic sodium concentration in a representative pore just after exchanging the solution in contact with the pore mouth from sea water to river water. Note that the expansion of the EDL has started in the region close to the mouth of the nanopore and that it is extending towards its interior.
Speaker: Dr. Emilio Ruiz-Reina (Departamento de Física Aplicada II, Universidad de Málaga)
• 16:45
Coffee Break 30m
• 17:15
Energías renovables y generación distribuida. 30m
La ponencia analiza el papel de las energías renovables en la generación distribuida, focalizando su atención en los aspectos vinculados al autoconsumo y a las instalaciones de baja y media potencia, tanto en entornos urbanos como en el medio rural. Se expondrán varios ejemplos de trabajos de investigación donde la aplicación de tecnologías de información geográfica es determinante para el desarrollo de modelos de autoconsumo en particular y de integración de las energías renovables en general.
Speaker: Dr. JAVIER DOMINGUEZ (CIEMAT)
• 17:45
Dependencia estructural y electrónica de las interfases polares y no polares entre el CuGaS2/CuAlSe2 y CuGaS2/ZnSe 30m
• 18:15
Impacto de la Implantación de Vanadio y vacantes de Silicio en la Estructura Cristalina y Propiedades de Absorción Ópticas del Silicio 30m
• 18:45
Solar cell architectures by combining graphene and carbon nanotubes with silicon 30m
There is intensive efforts in exploring innovated solar cell structures with high performance and cost-effective manufacturing methods. In this frame, emerging competitive technologies include the combination of inexpensive materials with conventional silicon wafers silicon. We will present graphene, carbon nanowires-Si junction solar cells with high efficiencies by coating an antireflection layer. We have used a titanium oxide coating because significantly inhibits light reflectance from the Si surface, resulting in an enhanced short-circuit current and external quantum efficiency. Solar cell characteristics were tested by a source meter, we have obtained the J-V curves (0- 0.6 eV) and the IPCE (300- 1200 nm). The light-to-electricity conversion in the solar cells involves several key steps, including light absorption, charge separation and carrier collection. The light absorption step determines how much fraction of incident photons can be absorbed by the semiconductor and the excitation of charge carriers. We have also measured the surface roughness because light reflection from polished silicon could be even 36%, resulting in significant energy loss in the light absorption stage, for this reason a suitable aspect ratio is required. The surface roughness has checked by electron irradiation the samples as a function of the incidence angle of the primary electrons (0-1000eV).
Speaker: Prof. Isabel Montero (CSIC)
• 15:15 19:15
Enseñanza, Divulgación e Historia de la Física: simposium conjunto con el 27º Encuentro Ibérico de Enseñanza de la Física Aula Biología (Facultad de Química (USC))

### Aula Biología

• 15:15
Enseñar a pensar como objetivo prioritario de la enseñanza (también de la Física) 45m
Speaker: Prof. Luis Ignacio García
• 16:00
Gravisolitones y ondas gravitacionales no lineales 30m
La astronomía de ondas gravitacionales ha nacido gracias a la observación de dos ondas gravitacionales originadas por la fusión de dos parejas de agujeros negros de masa estelar. Observadas por los dos detectores de Advanced LIGO a finales del año 2015, fueron la gran noticia científica del año 2016 (Science’s 2016 Breakthrough of the Year). La enseñanza y la divulgación científica de esta noticia siempre se centran en los aspectos lineales de la propagación de las ondas gravitacionales en un espaciotiempo plano. Sin embargo, tanto en su fuente, la fusión de objetos compactos, como en rigor en su esencia, se trata de un fenómeno fuertemente no lineal. En esta comunicación mi objetivo es reclamar la atención a este hecho al hilo de historia.
Speaker: Dr. Villatoro Francisco R. (Universidad de Malaga)
• 16:30
DRAMATIZAÇÃO: "A VIDA DE GALILEU EM (MAIS DE) DOIS ATOS" 15m
Atividade (e respetivo estudo de caso) realizada com professores e alunos, no contexto da História da Ciência, associada às principais descobertas de Galileu, que conduziram ao estabelecimento da Ciência Moderna. A dramatização desenrola-se em vários atos. Inicia-se com a declamação de uma poema de António Gedeão (pseudónimo de Rómulo de Carvalho, Linhas de Força, feito em homenagem a Galileu. Em seguida, enfatizam-se algumas das suas principais descobertas efetuadas nos anos de 1609 e 1610, nomeadamente a descoberta das fases de Vénus e das quatro principais luas de Júpiter, hoje designadas por "Satélites Galileanos". Depois, é recriado o julgamento de Galileu pelo Tribunal do Santo Ofício, bem com a carta de abjuração. Apresentam-se ainda os resultados dos estudos efetuados através de inquéritos e questionários, tendo em a avaliação da aceitação e pertinência da atividade, bem como a avaliação das aprendizagens significativas apreendidas pelos alunos participantes no processo.
Speaker: Prof. Jorge António (Agrupamento de Escolas de Montijo)
• 16:45
El enlace químico y la mecánica cuántica: cuando la física explicó lo que los químicos llevaban 70 años contando 15m
La explicación mecanocuántica del enlace químico es uno de los puntos de encuentro más importantes entre la física y la química. En esta comunicación se analizan los orígenes e historia, así como algunas consecuencias científico-docentes de esta conjunción. Se mencionan las dos teorías más significativas, TEV y TOM, y se repasa el currículo LOMCE en lo que atañe a esta cuestión.
Speaker: Prof. Jesús María Arsuaga (Universidad Rey Juan Carlos)
• 17:00
Coffee break 30m
• 17:30
Aprender física com o meu vizinho: o modelo colaborativo da Universidade de Harvard 45m
Nos últimos anos, estudos internacionais revelaram que os alunos aprendem melhor com os seus colegas - Peer Instruction, do que com os professores. Algumas razões explicam este fenómeno, mas uma das mais importantes é o facto dos alunos estarem mentalmente ativos quando discutem com os seus pares. Na metodologia Team & Project-based Approach (T&PBA), desenvolvida e implementada por Eric Mazur na Universidade de Harvard, o ambiente de aprendizagem consiste em seis atividades diversificadas, totalmente colaborativas (Peer Instruction) e segundo o modelo de aulas invertidas (Flipped Classrooms) [1], [2]. Neste ambiente há breves momentos de discussão por parte do professor e não existe exame final, apesar dos alunos serem continuamente avaliados e receberem feedback constante. Esta metodologia tem vindo a ganhar expressão em todo o mundo, tendo sido já adotada em vários países, em Universidades de referência, e em diferentes áreas. Referências [1] M. Eric, Peer Instruction: a user’s manual, 2ª ed., Prentice Hall, Inc., 1997. [2] N. Alan, Who Owns the learning, 1ª ed., Solution Tree, United Kingdom, 2012.
Speaker: Dr. Ana Rita Lopes Mota (Departamento de Física e Astronomia, Universidade do Porto)
• 18:15
La primera iluminación pública en España: de las pilas Bunsen a las pilas de combustible 15m
• 18:30
Rúbrica para evaluar los informes de laboratorio de Física 15m
La introducción de una enseñanza por competencias nos lleva a la búsqueda de nuevos instrumentos de evaluación como las rúbricas. En este trabajo, se presenta la encuesta realizada al alumnado de la materia de Física de Ingeniería Química para conocer su opinión sobre la rúbrica diseñada para orientar y evaluar la elaboración del informe de prácticas. Los resultados de esta encuesta nos muestran que la rúbrica es fácil de entender, contiene los elementos principales para el desarrollo del informe y sirve de orientación para la realización del informe de laboratorio.
Speaker: Mrs. Encina Calvo Iglesias (USC)
• 18:45
Scary Physics: la Física detrás del terror 15m
Con el principal objetivo de mostrar la física de una forma alternativa a la tradicional, la asociación sin ánimo de lucro Physics League de Valladolid ha creado el show divulgativo “Scary Physics”. Dicho espectáculo está dirigido al público en general y presenta distintos fenómenos físicos en el guión de una obra teatral aterradora. Para acercar todavía más los distintos sucesos al público, se han utilizado villanos y distintos personajes de películas de terror para ambientar el espectáculo.
• 19:00
HITOS Y DIDACTICA DE LA TERMODINÁMICA EN EEEMM 15m
Aunque en los currículos actuales de Química de las EEMM la docencia de conceptos tan abstractos como la entalpía, la entropía y la energía libre, se proponen ya en 1º de Bachillerato (antes en 2º) como meros algoritmos aplicados a casos concretos de predicción de espontaneidad de reacciones químicas, entalpía de procesos, etc.. el hecho es que este tema sigue siendo el de peor comprensión de todo el temario para los chicos y el más incómodo de impartir para los profesores críticos. Creo que procede una revisión cualitativa de estos tópicos desde una perspectiva histórica que puede añadir rigor, claridad, amenidad, y una dimensión tecnológica al tema. Se comentan al final algunos recursos para la didáctica del primer principio.
Speaker: Mr. francisco sotres (grupo de didactica e historia de la fisica y quimica)
• 15:15 19:00
Molecular Physics at the Edge II Aula Matemáticas (Facultad de Química (USC))

### Aula Matemáticas

• 15:15
Experimental characterization of the basic intermolecular interaction components 30m
The target of the present work is the detailed characterization of the most relevant components of the intermolecular interaction, which control the molecular dynamics under a variety of conditions. To this purpose, molecular beam experiments have been performed under conditions proper to isolate quantum effects in the single collision events, which probe in detail the projectile-target interaction. Particular attention is addressed to range, strength and anisotropy of non-covalent interaction components, due to the balance of size (or Pauli) repulsion with dispersion and induction attraction, to which must be added electrostatic contributions, and of other components of covalent (chemical) nature, mostly affected by charge (electron) transfer effects. The analysis of several experimental findings has been important to develop suitable analytical representations of the potential energy surfaces (PESs), tested and improved by exploiting also the comparison with results of ab initio calculations, useful to provide an internally consistent description of the intermolecular interaction both in the most and less stable configurations of the interacting system. The proper formulation of the PESs is crucial not only to describe the dynamics of elementary processes occurring in interstellar medium and in planetary atmospheres, but also to control equilibrium a non-equilibrium phenomena of applied interest, as those occurring in combustion, flames and plasmas. Acknowledgment The financial support of this research is from the “Fondazione Cassa di Risparmio di Perugia” (Contract No. 2015.0331.021) and from the “Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia”
Speaker: Prof. Fernando Pirani (Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia)
• 15:45
Ultrafast broadband transient absorption spectroscopy of a single molecule 20m
We present the first ultrafast transient absorption of a single molecule. Specifically, we trace the femtosecond evolution of excited electronic state spectra of single molecules over hundreds of nanometers of bandwidth at room temperature. The non-linear ultrafast response of the single molecule is probed using a broadband laser in an effective 3-pulse scheme with fluorescence detection. A first excitation pulse is followed by a phase-locked de-excitation pulse-pair, providing spectral encoding while preserving 25 fs temporal resolution. This experimental realization of true single molecule transient absorption spectroscopy demonstrates that two-dimensional electronic spectroscopy of single molecules is experimentally in reach.
Speaker: Prof. Niek F. van Hulst (ICFO - the Institute of Photonic Sciences)
• 16:05
The quest towards supramolecular networks from first principles 20m
How far into molecular complexity can we get from first principles? Can we predict specific recognitions between molecules from the computation of the relevant conformations and interactions? Is it then possible to forsee how assemblies of molecules spontaneously conform functional nanostructures and materials? Will we ever understand the behaviour of living organisms from the investigation of their molecular building blocks? Should we even dare? These are challenging but central questions in the scientific activity of chemical physicist. A modest illustration of this topic can be obtained from an overview of the incursions of our group into molecular recognition and supramolecular aggregation over the last decade.
Speaker: Dr. Bruno Martínez Haya (Universidad Pablo de Olavide)
• 16:25
Acid dissociation in microsolvated environments 20m
The long-standing and fundamental question regarding the minimum number of water molecules required to dissociate an acid molecule in an aqueous microsolvation environment still remains open. For HCl interacting with water molecules - one added after the other - there is convincing evidence that an ion pair, and thus the dissociated acid molecule, can be stabilized using a minimum number of only four water molecules (see Fig. 1) [1,2]. However, this number has been questioned both on the experimental [3–6] and the theoretical sides [7]. In this respect, an experiment appeared recently in the literature [8] which suggested a new approach. In this experiment the dipole moment of HCl•(H2O)n clusters was measured as a function of the number of water molecules (see Fig. 2). The key result of those measurements was a noticeable rise of the total dipole moment of these clusters when n=6. A tempting explanation was to assign this sudden rise in the dipole moment to the dissociation of the HCl molecule. In this work, ab initio path integral calculations were performed in order to try to disentangle the controversy of whether it is 4 or 6 water molecules the minimum required to dissociate the chloridric acid. Our results show that measuring the dipole moment of HCl•(H2O)n clusters does not give any information about the dissociative state of the HCl molecule. In addition, a detailed analysis of thermal and quantum effects provides a much clearer picture of the acid dissociation process in microsolvated environments. The Cluster of Excellence “RESOLV” (EXC 1069) funded by the Deutsche Forschungsgemeinschaft (DFG) is gratefully acknowledged along with computer time support from HPC-RESOLV, HPC@ZEMOS, BOVILAB@RUB and RV-NRW. References [1] A. Gutberlet, G. Schwaab, Ö. Birer, M. Masia, A. Kaczmarek, H. Forbert, M. Havenith, D. Marx, Science 324 (2009) 1545. [2] H. Forbert, M. Masia, A. Kaczmarek-Kedziera, N. N. Nair, D. Marx, J. Am. Chem. Soc. 133, (2011) 4062. [3] D. Skvortsov, S. J. Lee, M. Y. Choi, and A. F. Vilesov, J. Phys. Chem. A 113, (2009) 7360 . [4] S. D. Flynn, D. Skvortsov, A. M. Morrison, T. Liang, M. Y. Choi, G. E. Douberly, A. F. Vilesov, J. Phys. Chem. Lett. 1 (2010) 2233. [5] A. M. Morrison, S. D. Flynn, T. Liang, G. E. Douberly, J. Phys. Chem. A 114 (2010) 8090. [6] M. Letzner, S. Gruen, D. Habig, K. Hanke, T. Endres, P. Nieto, G. Schwaab, L. Walewski, M. Wollenhaupt, H. Forbert, D. Marx, M. Havenith, J. Chem. Phys. 139 (2013) 154304. [7] A. Vargas-Caamal, J. L. Cabellos, F. Ortiz-Chi, H. S. Rzepa, A. Restrepo, G. Merino, Chem. Eur. J. 22 (2016) 2812. [8] N. Guggemos, P. Slavíček, V. V. Kresin, Phys. Rev. Lett. 114 (2015) 043401.
Speaker: Dr. Ricardo Pérez de Tudela (Lehrstuhl für Theoretische Chemie, NC 03/52, Ruhr-Universität Bochum, 44780 Bochum, Germany)
• 16:45
Hybrid Organic-Inorganic Halide Perovskites for Photovoltaics and Lasing Applications: Insights from First Principles Calculations 20m
see attached file
Speaker: Dr. Giacomo Giorgi (Department of Civil and Environmental Engineering (DICA), The University of Perugia, Perugia, Italy)
• 17:05
Coffee break 25m
• 17:30
Revealing the low-energy landscape of clusters: from the solvation of ions to the self-assembling of colloidal particles 30m
Introduction Knowledge about the structure that different types of matter may acquire is fundamental to understand several properties emerging around in Nature and to build up new materials. Such structural organization can be observed at different scales, ranging from aggregates of atoms in the gas-phase to colloids in condensed-matter physics. From the theoretical view point, one has to model the interactions among the particles of the system (e.g., atoms or molecules) and, then, apply optimization techniques. In general, this is a very difficult task that requires the application of state-of-the-art optimization methods. Over the past decade or so, we have developed evolutionary algorithms (EAs) that has been able to discover putative global minima for various cluster systems, including atomic [1-3], molecular [4] and colloidal [5,6] clusters. In this talk, we will present the main ingredients of our EA and its application to the solvation of ions [7,8] as well as to the study of self-assembling phenomena in colloidal systems [6,9,10]. In particular, we will focus on the study of alkali-ions solvation (Figure 1) and the formation of aggregates of charged colloidal particles (Figure 2). The analysis of the energetics and structure of the clusters relies on the features of the potential functions employed for modeling the interactions among the particles. Acknowledgments We acknowledge the support from the Coimbra Chemistry Center (CQC), which is financed by the Portuguese “Fundação para a Ciência e a Tecnologia” (FCT) through the Project No 007630 UID/QUI/00313/2013, co-funded by COMPETE2020-UE. We also acknowledge the FCT/CAPES bilateral Project (Ref: 2984/DRI and 88887.125439/2016-00/CAPES). References [1] F.B. Pereira, J.M.C. Marques, T. Leitão, J. Tavares, “Designing efficient evolutionary algorithms for cluster optimization: a study on locality”, in: P. Siarry, Z. Michalewicz (Eds.), Advances in Metaheuristics for Hard Optimization (Springer Natural Computing Series), Springer, Berlin, 2008, pp. 223-250. [2] F.B. Pereira, J.M.C. Marques, Evol. Intel. 2 (2009) 121. [3] J.M.C. Marques, F.B. Pereira, Chem. Phys. Lett. 485 (2010) 211. [4] J.L. Llanio-Trujillo, J.M.C. Marques, F.B. Pereira, J. Phys. Chem. A 115 (2011) 2130. [5] J.M.C. Marques, F.B. Pereira, J. Mol. Liq. 210 (2015) 51. [6] S.M.A. Cruz, J.M.C. Marques, F.B. Pereira, J. Chem. Phys. 145 (2016) 154109. [7] J.M.C. Marques, F.B. Pereira, J.L. Llanio-Trujillo, P.E. Abreu, M. Albertí, A. Aguilar, F. Pirani, M. Bartolomei, Phil. Trans. R. Soc. A 375 (2017) 20160198. [8] F.V. Prudente, J.M.C. Marques, F.B. Pereira, in preparation. [9] S.M.A. Cruz, J.M.C. Marques, J. Phys. Chem. B 120 (2016) 3455. [10] S.M.A. Cruz, J.M.C. Marques, Comput. Theor. Chem. 1107 (2017) 82.
Speaker: Prof. Jorge Marques (Department of Chemistry, University of Coimbra)
• 18:00
Coarse-graining polycyclic aromatic hydrocarbon clusters 20m
In this talk we present a coarse-grained model based on the Paramonov-Yaliraki (PY) potential [1] for modeling interacting polycyclic aromatic hydrocarbon (PAH) molecules [2]. This model is parameterized using all-atom reference data to study coronene (C24H12), circumcoronene (C54H18) and their aggregates. We show the ability of the coarse-grained approach to reproduce the global minima predicted by the all-atom potential for clusters containing up to 20 molecules. One-dimensional columnar motifs are found to be most favourable in small clusters with mixed stacks in larger clusters. Dynamical and thermodynamical properties of the coronene octamer are discussed in the energy landscapes framework [3]. From a connected database of stationary points of the potential energy surface and using the harmonic normal mode approximation, we show the potential and free energy landscapes and relevant rearrangement pathways between competing motifs, as determined using discrete path sampling [4], which exhibit highly cooperative motion [5].
Speaker: Dr. Javier Hernandez-Rojas (Departamento de Física, Universidad de La Laguna)
• 18:20
Experimental and simulation studies of the stepped adsorption of gases on silicalite-2 20m
Speaker: Dr. Gonzalez Eva (CSIC)
• 18:40
Computational study of mixtures of ILs and alcohols under nanoconfinement conditions 20m
Mixtures of 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM][BF4] ionic liquid with molecular amphiphilic solvents, methanol and ethanol under nanoconfinement between neutral and charged graphene walls are studied in this work by means of molecular dynamics simulations. The adsorption of alcohol molecules in the walls as well as their distribution in the directions normal and parallel to the interface are studied. The results of these simulations are compared with results of the pure IL and its mixtures with water, which were previously reported in ref. [1]. All the results suggest that alcohols distribute quite uniformly throughout the box, being almost totally depleted from graphene walls. The distribution of ions of the first and second layers closest to the electrodes in the direction parallel to these are also studied by means of bidimensional density maps, showing a clear structural transition from a striped pattern to an hexagonal one with the concentration of cosolvent and also when the size of the cosolvent molecules increases. These transitions seem to be highly sensitive to the presence of cosolvent molecules in the ionic layers closest to the electrodes. It was also corroborated that the bidimensional ionic structures persist in the second ionic layer close to the graphene walls. This persistence of the bidimensional ionic structure combined with the electric double layer (see refs. [2-5]) strongly conditions the three dimensional ionic structure near charged interfaces in these dense ionic systems. Moreover, recent studies have shown that this bidimensional structures appear in ILs in other circumstances, like mixtures with salts, mixtures with other cosolvents solvents like water or when the graphene walls have vacancy defects (see ref. [6]). In this work we report the formation of these structures when the molecular size of the solvent changes. References [1] B. Docampo-Álvarez, V. Gómez-González, H. Montes-Campos, J. M. Otero-Mato, T. Méndez-Morales, O. Cabeza, & L. M. Varela (2016). J. Phys. Cond. Mat., 28(46), 464001. [2] A. A. Kornyshev, (2007). J. Phys. Chem. B, 111(20), 5545-5557. [3] M. V. Fedorov & A. A. Kornyshev, (2008). J. Phys. Chem. B, 112(38), 11868-11872. [4] M. V. Fedorov, N. Georgi & A. A. Kornyshev, (2010). Electrochem. Commun., 12(2), 296-299. [5] M. Z. Bazant, B. D. Storey & A. A. Kornyshev, (2011). Phys. Rev. Lett., 106(4), 046102(1)-046102(4). [6] H. Montes-Campos, J. M. Otero-Mato, T. Méndez-Morales, O. Cabeza, L. J. Gallego, A. Ciach, R. M. Lynden-Bell & L. M. Varela, (2017). Submitted for publication.
Speaker: Mr. José Manuel Otero Mato (Universidad de Santiago de Compostela)
• 15:15 19:05
Quantum Materials and Technologies (GEFES) II Aula Química Inorgánica (Facultad de Química (USC))

### Aula Química Inorgánica

• 15:15
Andreev levels in hybrid superconductor-semiconductor nanowire quantum dots: Energy scaling and spin texture 30m
The interaction of a magnetic impurity and a superconductor yields localized states known as Andreev levels or Yu-Shiba-Rusinov (YSR) states. Recently, there has been a growing interest in this type of system, in a large part, due to theoretical work that suggests that Andreev levels are precursors of Majorana zero modes. Accordingly, it has been proposed that chains of such impurities could be engineered, under appropriate conditions, into a topological superconductor [1-9]. A semiconductor quantum dot coupled to a superconductor constitutes a versatile platform to investigate, in a controllable and quantitative manner, the physics of the corresponding single-impurity limit. Here, we have employed single quantum dots defined in an InAs nanowire, coupled strongly to a superconductor and weakly to a normal metal probe, to study the Andreev levels by tunneling spectroscopy. First, we exploit the ability to tune the hybridization of the quantum dot and the superconductor to quantitatively investigate the energy scaling of Andreev levels. We demonstrate that the energy of such sub-gap excitations scales with the ratio of the Kondo temperature and the superconducting gap. We further leverage the electrical control over device parameters to obtain an experimental phase diagram of the possible ground states: a spin singlet or a magnetic doublet. Our experimental results show remarkable quantitative agreement with numerical renormalization group calculations [10]. In parallel, we have studied the spin texture of the Andreev levels in the presence of an external magnetic field. We demonstrate that the Zeeman effect results in a splitting of the sub-gap states only when the ground state is a spin singlet. In this case, the applied magnetic field can also lead to a quantum phase transition to a spin-polarized ground state [11]. The herein demonstrated electrical tuning of Andreev levels as well as their spin-polarization could be harnessed to pursue proposals of realizing a topological superconductor using quantum dot arrays [7-9]. [1] S. Nadj-Perge et al., Phys. Rev. B 88, 020407(R) (2013). [2] K. Klinovaja et al., Phys. Rev. Lett. 111, 186805 (2013). [3] M. M. Vazifeh and M. Franz, Phys. Rev. Lett. 111, 206802 (2013). [4] B. Braunecker and P. Simon, Phys. Rev. Lett. 111, 147202 (2013). [5] F. Pientka et al., Phys. Rev. B 88, 155420 (2013). [6] S. Nadj-Perge et al., Science 346, 602 (2014) [7] J. D. Sau and S. Das Sarma, Nat. Commun. 3, 964 (2012). [8] M. Leijnse and K. Flensberg, Phys. Rev. B 86, 134528 (2012) [9] I. C. Fulga et al., New J. Phys. 15, 045020 (2013). [10] Lee et al., to appear in Phys. Rev. B – Rapid Commun. [11] Lee et al., Nat. Nanotechnol. 9, 79 (2014).
Speaker: Dr. Eduardo Jian Hua Lee (Instituto de Fisica de la Materia Condensada - Universidad Autonoma de Madrid)
• 15:45
Mapping the orbital structure of Shiba states in a superconductor 20m
Magnetic impurities inside a superconductor locally distorts superconductivity. They scatter Cooper pairs as a potential with broken time-reversal symmetry, what leads to localized bound states (usually refered as Shiba states) with subgap excitation energies. These states, first predicted by Yu, Shiba, and Rusinov [1], are identified in scanning tunneling spectra as pairs of intra-gap resonances symmetrically positioned around zero-bias. Most conventional approaches to study Shiba states treat magnetic impurities as point scatterers with an isotropic exchange interaction, while the complex internal structure of magnetic impurities is usually neglected. Due to the orbital character of the scattering channels of the impurities, it is expected that Shiba multiplets reflect the occupation level of the atomic shell, what would render them as the ideal probe for identifying the magnetic ground state of a single impurity in a superconductor. In this presentation, I will show high-resolution scanning tunneling spectroscopy measurements and Density Functional Theory simulations, which provide evidence that that the number and shape of Shiba states are correlated to the spin-polarized atomic orbitals of the impurity, hybridized with the superconducting host. We investigated Cr impurities on Pb(111) [2] and spatially map the five Shiba excitations found inside the superconducting gap, resolving both their particle and hole components. While the maps of particle components resemble the d orbitals of embedded Cr atoms, the hole components differ strongly from them. The orbital fingerprints of Shiba states thus unveil the magnetic ground state of the impurity, and identify scattering channels and interactions, all valuable tools for designing atomic-scale superconducting devices.
Speaker: Prof. Nacho Pascual (Ikerbasque Research Professor ,CIC nanogune)
• 16:05
Zero-energy pinning from interactions in Majorana nanowires 20m
Majorana zero modes at the boundaries of topological superconductors are charge-neutral, an equal superposition of electrons and holes. This ideal situation is, however, hard to achieve in physical implementations, such as proximitised semiconducting nanowires of realistic length. In such systems Majorana overlaps are unavoidable and lead to their hybridisation into charged Bogoliubov quasiparticles of finite energy which, unlike true zero modes, are affected by electronic interactions. We here demonstrate that these interactions, particularly with bound charges in the dielectric surroundings, drastically change the non-interacting paradigm. Remarkably, interactions may completely suppress Majorana hybridisation around parity crossings, where the total charge in the nanowire changes. This effect, dubbed zero-energy pinning, stabilises Majoranas back to zero energy and charge, and leads to electronically incompressible parameter regions wherein Majoranas remain insensitive to local perturbations, despite their overlap.
Speaker: Dr. Pablo San-Jose (ICMM-CSIC)
• 16:25
Measuring Majorana non-locality and spin structure with a quantum dot 20m
Robust zero bias transport anomalies in semiconducting nanowires with proximity-induced superconductivity have been convincingly demonstrated in various experiments. While these are compatible with the existence of Majorana zero modes at the ends of the nanowire, a direct proof of their non-locality and topological protection is now needed. Here we show that a quantum dot at the end of the nanowire may be used as a powerful spectroscopic tool to quantify the degree of Majorana non-locality through a local transport measurement. Moreover, the spin polarization of dot sub-gap states at singlet-doublet transitions in the Coulomb blockade regime allows the dot to directly probe the spin structure of the Majorana wavefunction, and indirectly measure the spin-orbit coupling of the nanowire.
• 16:45
Coffee Break and Posters 1h
• 17:45
Graphene based nuclear spin quantum bits 20m
In this work, we study the possibility of hydrogenated graphene based Qubits. The chemisorption of hydrogen in graphene provides a nuclear spin 1/2 as well as the localization of an electron in the vicinity of the adatom, very much like in the Qubits based on P donors in Si[1-4]. The possibility to control with atomic precision the chemisorption of hydrogen[5], along with the high tunability of the electronic properties of graphene (and graphene nano-structures)[6], offers a great tool to control the interactions in the system allowing to perform single and two-qubit operations. We use a 4 orbital tight-binding model in the Slater-Koster approximation, validated with DFT calculations, to explore the tunability of the interactions and the feasibility of these ideas. [1] B. E. Kane, Nature 393, 133-137 (1998) [2] A. Morello, et al Nature 467, 687–691 (2010) [3] M. Veldhorst, et al, Nature Nanotechnology 9, 981–985 (2014) [4] J. P. Dehollain, et al, Nature Nanotechnology 9, 986–991 (2014) [5] H. González-Herrero, et al, Science 352, 437 (2016) [6] Y. Zhang, et al, Nature, 459, 820–823 (2009)
Speaker: Mr. Noel Garcia (International Iberian Nanotechnology Laboratory)
• 18:05
Manipulability, coherence and entanglement of acceptor qubits in Si and Ge 20m
The search for electric field manipulable spin qubits has focused the attention in the recent years to high spin-orbit systems. These systems mix the spin with orbital degrees of freedom. As the orbital wavefunction is sensitive to electric fields, this mixing allows the possibility of manipulating spins entirely by electric means. The large spin-orbit coupling in the valence band of group IV semiconductors provides then with an electric field knob for hole based spin-qubit manipulation. Si and Ge are also known for their extraordinary coherence properties, making them two of the most promising candidates to host spin-qubits. In this work we consider acceptor impurities placed in these hosts. These acceptors behave as spin-3/2 particles with remarkable properties that can be tuned through both electric and magnetic fields. We find that the spin manipulation of holes bound to acceptors in engineered SiGe quantum wells depends very strongly on the electric field applied and on the heterostructure parameters. The g-factor is enhanced by the Ge content and can be tuned by shifting the hole wave-function between the heterostructure constituent layers. The lack of inversion symmetry induced both by the quantum well and the electric fields together with the g-factor tunability allows the possibility of different qubit manipulation methods such as electron spin resonance, electric dipole spin resonance and g-tensor modulation resonance. Rabi frequencies up to hundreds of MHz can be achieved with heavy-hole qubits, and of the order of GHz with light-hole qubits. We also find that by carefully choosing the parameters of the system such as the in-plane magnetic field and the applied vertical electric field it is possible to tune the entanglement and coherence properties of the system.
Speaker: Mr. José Carlos Abadillo-Uriel (Instituto de Ciencia de Materiales de Madrid, CSIC)
• 18:25
Coupling small spin ensembles to superconducting on-chip resonators: towards a hybrid architecture for quantum information 20m
The field of cavity quantum electrodynamics (QED) studies the interaction of photons in resonant cavities with either natural or “artificial” atoms, such as quantum dots and superconducting qubits, having a nonlinear and discrete energy level spectrum [1]. For applications in spectroscopy and especially quantum information processing, a major goal is to maximize the coupling strength g1 of the atom to either electric or magnetic cavity fields, making it larger than the decoherence rates of both the cavity and the atom (strong coupling regime). Attaining this regime for individual spin qubits would open the possibility of developing an all-magnetic quantum processor [2]. This goal remains, however, very challenging because the interaction of each spin with the photon’s magnetic field is much weaker than the typical decoherence rates of the resonator and of most magnetic qubits. For this reason, strong coupling has been observed only in the case of macroscopic spin ensembles, containing N > 10^12 spins, for which the effective collective coupling gN is enhanced by a factor N^(1/2) with respect to that of a single spin [3,4]. We have recently shown that the microwave magnetic field of a coplanar superconducting resonator can be enhanced locally via the fabrication of nanoscopic constrictions at its central line [5]. In this communication, we report the results of experiments performed on small spin ensembles directly deposited onto such constrictions. 1.5 GHz superconducting resonators were fabricated by optical lithography on Nb layers grown onto crystalline sapphire substrates. A typical design is shown in Fig. 1A. The width w of the central line can be reduced from the original 14 microns down to less than 50 nm by using a focused beam of Ga+ ions, without appreciably altering the resonator characteristics (Figs. 1B and 1C) [5]. Experiments were also performed using a w = 400 microns wide central line resonator. The magnetic samples consist of ensembles of DPPH free radicals, each having a spin s = 1/2 with a fully isotropic gyromagnetic factor g = 2 and a negligibly small inhomogeneous broadening.6 Molecules were deposited onto the devices from a saturated solution in DMSO. For large ensembles on standard resonators, the deposition was made using a micropipette and the size of the spin ensemble varied by controlling the droplet volume. Smaller spin ensembles were deposited using dip-pen nanolithography.7 The tip of an atomic force microscope (AFM) is used to write small dots (between 5 and 60 microns wide) with a very high spatial resolution. The number of spins N lying inside the area of the constriction was accurately determined from Scanning Electron Microscopy and AFM experiments (Fig 1D). The transmission S21 of microwave radiation trough the resonators was measured at T = 4.2 K as a function of magnetic field and frequency omega. The maximum transmission, near the ground mode at omega/2pi = 1.5 GHz, and the effective Q factor decrease sharply when the field brings the spins into resonance with the circuit. From these experiments, the collective coupling constant has been determined for samples with N varying between 10^8 and 10^16 spins. The results (Fig. 1 E) show that gN is proportional to N^(1/2) both for the original resonators and for the constrictions. However, the average coupling to each spin g1 = gN/N^(1/2), is enhanced by more than two orders of magnitude (from 0.25 Hz up to 50 Hz) in the latter case. As a result, magnetic ensembles, e.g. a 30 microns drop, that are completely undetectable with a conventional resonator become visible when they are deposited near a superconducting nano-bridge. Furthermore, the dependence of g1 on the width of the central line agrees quantitatively with theoretical predictions (Fig. 1 F) [8]. These results show that the coupling of spin qubits to quantum superconducting circuits can be enhanced via a combination of top-down and bottom up nanolithography techniques. In the present experiments, the spin-photon coupling remains in the weak coupling regime because DPPH shows decoherence rates 1/T2 > 12 MHz. The strong coupling regime might, however, be attained for especially designed molecular spin qubits that can show 1/T2 values as small as 1 kHz [9]. Furthermore, reaching this limit for individual spins, a pre-requisite for the development of a magnetic quantum processor, will then also be feasible provided that nanofabrication techniques are pushed down to w < 10 nm. References [1] R. J. Schoelkopf and S. M. Girvin, Nature 451 (2008) 669 [2] M. D. Jenkins, D. Zueco, O. Roubeau, G. Aromí, J. Majer and F. Luis, Dalton Trans. 45 (2016) 16682. [3] D. I. Schuster et al, Phys. Rev. Lett. 105 (2010) 140501 [4] R. Amsüss et al, Phys. Rev. Lett. 107 (2011) 060502 [5] M. D. Jenkins et al, Applied Physics Letters 105 (2014) 162601 [6] N. D. Yordanov, Appl. Magn. Res. 10 (1996) 339 [7] M. J. Martínez-Pérez, E. Bellido, R. de Miguel, J. Sesé, A. Lostao, C. Gómez-Moreno, D. Drung, T. Schurig, D. Ruiz-Molina, and F. Luis, Applied Physics Letters 99 (2011) 032504 [8] M. D. Jenkins, T. Hümmer, M. J. Martínez-Pérez, J. J. García-Ripoll, D. Zueco and F. Luis, NJP 15 (2013) 095007 [9] J. M. Zadrozny, J. Niklas, O. G. Poluektov and D. E. Freedman, ACS Cent. Sci. 1 (2015) 488
Speaker: Dr. Fernando Luis (Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC-Universidad de Zaragoza)
• 15:15 18:45
Quantum and Non-linear Optics Aula Química General (Facultad de Química (USC))

### Aula Química General

• 15:15
Domain Statistics Analysis of Disordered Structures via Second Harmonic Generation 20m
We show a method to experimentally characterize the any 2D random distribution of ferroelectric domains in a nonlinear crystal such as SBN, which is difficult to observe by other methods. It is based on second harmonic diffraction of light pulses and it allows us to determine the domain size distribution. Comparison with simulation results shows good agreement. It has also been used to characterize more complicated domain distributions.
Speaker: Prof. Ramon Vilaseca (Universitat Politecnica de Catalunya (UPC))
• 15:35
Generación de haces de luz vectoriales mediante láminas-Q 20m
Los haces de luz vectoriales, con un patrón de polarización no uniforme en su sección, están recibiendo mucha atención debido a sus interesantes aplicaciones. Estos haces pueden generarse mediante las denominadas láminas-q, retardadores lineales cuyo eje óptico rota una fracción q del ángulo azimutal. En esta comunicación revisamos los trabajos recientes de nuestro grupo en la generación de haces vectoriales mediante láminas-q. Presentamos resultados obtenidos con tres tipos de dispositivos. En primer lugar, un prototipo sementado y sintonizable, de cristal líquido. En segundo lugar, láminas q comerciales, no sintonizables, por lo que debe especificarse la longitud de onda de operación y no sementadas. Finalmente, hemos diseñado un sistema óptico que implementa láminas-q arbitrarias en un modulador espacial de luz (SLM) de cristal líquido. Ello permite generar nuevos diseños con valores arbitrarios de q (negativos, fraccionales). Además, permite codificar láminas-q combinadas simultáneamente con otros elementos ópticos, y generar así haces vectoriales exóticos.
Speaker: Prof. María del Mar Sánchez López (Universidad Miguel Hernández)
• 15:55
Stable Bessel Vortex Beams Sustained By Multiphoton Absorption In Self-focusing Kerr Media 20m
Bessel vortex beams (BVBs) are vorticity-carrying nonlinear Bessel modes, propagation-invariant solutions of the nonlinear Schödinger equation with Kerr and multiphoton absorption (MPA) nonlinearities. As for the fundamental nonlinear Bessel beam case, their stationarity is supported by a power reservoir mechanism, which arises from its weak localization. In this work it is demonstrated how the MPA effect provides BVBs of simple and multiple topological charges with complete stability against both azimuthal breakup and collapse. A linearized stability analysis for small perturbations is used to vaticinate the stabilizing properties, and direct numerical simulations to verify the results. Furthermore, it is described how the model here proposed allows a common explanation to the three dynamical regimes previously observed in axicon-generated vortex beams propagating in nonlinear media: tubular, rotatory or specklelike filament regimes.
Speaker: Mr. Márcio Bruno Da Silva Matos Carvalho (Universidad Politécnica de Madrid)
• 16:15
Extreme nonlinear response in graphene 20m
High-order harmonic generation (HHG) is a remarkable process resulting from the interaction of physical systems with intense electromagnetic radiation. The generation of high-order harmonics is well-established in atomic and molecular gases. However, much progress have been done towards HHG in solids since the first experimental observation. HHG from solids has burgeoned a great interest, mainly motivated by the quadratic scaling of the harmonic conversion efficiency with the density of the target, as a result of the coherent nature of the process. While semiconductors materials have been well studied, it is not the case for two-dimensional materials as graphene. In this work we present a theoretical approach to describe the induced dynamics responsible for HHG in graphene. We predict the possibility to produce HHG with few-cycle mid-IR laser pulses.
Speaker: Dr. Antonio Picón (Universidad de Salamanca)
• 16:35
Photonic analogs of wave-like dark matter 20m
We point out formal connections between the astrophysical dynamics of dark matter and the propagation of laser beams in thermooptical media. This paves the way for the design of experiments with dark matter analogs and for cross-fertilization between these two fields.
Speaker: Dr. Angel Paredes Galan (Universidade de Vigo)
• 16:55
Coffee break 30m
• 17:25
Mode-division (de)multiplexing using adiabatic passage and supersymmetric waveguides 20m
Integrated optical devices exhibiting both high fidelity and high speed transmission are expected to foster novel communication platforms paving the way for scalable photonic quantum technologies. Moreover, the emerging technology of Space-Division Multiplexing [1] has recently attracted a lot of attention due to the increasing demand of high-capacity optical transmissions and the proximity of the capacity crunch, being Mode-Division Multiplexing (MDM) one of the solutions proposed to take profit of the spatial degrees of freedom working with multimode channels. In this context, integrated MDM devices are being developed using many different approaches including Supersymmetric (SUSY) optical devices [2] which are one of the most promising alternatives to standard spatial multiplexing devices offering global phase-matching and efficient mode conversion in an integrated and scalable way. However, the main drawback of SUSY optical devices is their lack of robustness against variations of parameter values such as light's wavelength and their sensitiveness to experimental imperfections. This can be solved making use of Spatial Adiabatic Passage (SAP) techniques which have been proposed and experimentally reported as a high-efficient and robust method to transfer a light beam between the outermost waveguides in a system of three identical evanescently-coupled waveguides [3]. We propose to combine SUSY and SAP techniques to design an efficient and robust device which can be used for multiplexing/demultiplexing spatial modes, to manipulate and study the modal content of an input field distribution or to filter signals and remove non-desired modes [4]. We demonstrate that a system of three coupled waveguides, with two identical step-index external waveguides and a supersymmetric central one, engineered along the propagation direction to optimize SAP for the first excited spatial mode of the step-index waveguides, can be used to demultiplex a superposition of the two lowest (m=0,1) transverse electric TEm spatial modes. Thus, we obtain a great improvement in terms of robustness and efficiency with output fidelities F>0.90 for a broad range of geometrical parameter values and light's wavelengths, reaching F=0.99 for optimized values at the telecom wavelength λ=1.55 µm. Although we have designed the device to operate at telecom wavelengths, it can be optimized to work at different wavelengths and moreover, due to its high efficiency for a broad wavelength range, it may be used for mode filtering of light pulses and it is fully compatible with wavelength division multiplexing. As a proof of principle, we have focused on the simplest possible case for which only two TE spatial modes can propagate through the step-indexplanar waveguides but this configuration can be generalized to a higher number of TE modes, to transverse magnetic modes or even to orbital angular momentum modes in multimode optical fibers. In addition, the device can be engineered to separate different modes by applying SUSY reiteratively and more complex devices can be constructed in order to demultiplex N spatial modes in an efficient and robust way by coupling in series different devices. Finally, the high obtained fidelities open promising perspectives in the field of quantum integrated photonics to, for instance, prepare and manipulate quantum states with minimal errors or by taking profit of the high dimensional Hilbert space associated to spatial modes. [1] D.J. Richardson, J.M. Fini, L.E. Legario. Nat. Photon. 7 (2013) 354. [2] M. Heinrich, M.A. Miri, S. Stützer, R. El-Ganainy, S. Nolte, A. Szameit, D.N. Christodoulides. Nat. Commun. 5 (2014) 3698. [3] R. Menchon-Enrich, A. Benseny, V. Ahufinger, A.D. Greentree, Th. Busch, J. Mompart. Rep. Prog. Phys. 79 (2016) 074401. [4] G. Queraltó, J. Mompart, V. Ahufinger. Submitted to: Light: Science & Applications. (2017).
Speaker: Mr. Gerard Queraltó Isach (Universitat Autònoma de Barcelona)
• 17:45
SERS sensors made of polymers and Aluminum to check the health of artworks 20m
Speaker: Mr. Manuel Gómez (CIQUS, Center for Research in Biological Chemistry and Molecular Materials, Santiago de Compostela University, 15782, Santiago de Compostela, Galicia, Spain)
• 18:05
Testing macroscopic realism with measurements of light polarization 20m
We study Leggett-Garg inequalities and no-signaling in time to determine the macrorealistic character of light polarization. In particular we present a model based on photon extraction. We show that violations of macrorealism occur for sufficietly invasive measurements, while for sufficiently coarse-grained measurements violations vanish.
Speaker: Prof. Eugenio Roldán Serrano (Universitat de València)
• 18:25
Time-dependent density functional theory of magneto-optical response 20m
Though the perturbation theory has been successfully used to describe various types of responses of molecules to electromagnetic fields for a long time, the extension of this theory to solids is not straightforward since the position operator is ill defined for such systems. The theoretical description of magnetic fields in periodic systems is particularly challenging as it leads to non-perturbative changes in eigenstates. We present an approach to calculation of magneto-optical response within the density matrix formalism applicable both to molecules and solids. The density matrix perturbation theory is implemented in open-source Octopus code using efficient Sternheimer method for solution of the Liouville equation. The implemented procedures are tested against available literature data for molecular and crystalline systems.
Speaker: Dr. Irina Lebedeva (Universidad del País Vasco)
• 15:20 18:25
Particle and Theoretical Physics I Aula Química Técnica (Facultad de Química (USC))

### Aula Química Técnica

Conveners: Dr. Isidro González Caballero (Universidad de Oviedo), Dr. JOSE SALT (IFIC), Dr. Santiago Gonzalez de la Hoz (IFIC)
• 15:25
Measurement of the CP-violating weak phase φs in Bs0 → (K+π−)(K−π+) decays at LHCb 30m
The huge abundance asymmetry between matter and antimatter present in our Universe remains as a mystery nowadays. Only the weak interaction (of the four fundamental ones) is known to mediate processes where the Charge-Parity (CP) symmetry is violated (this meaning different production rates for particles and antiparticles). However, the size of this effect is very small, and new sources of CP violation (outside the Standard Model) are searched for. The LHCb experiment, at CERN, is designed to study CP violation in the decays of hadrons containing b (beauty) quarks, produced in proton-proton collisions in the Large Hadron Collider. New heavy particles may enter such processes via “quantum loops”, modifying the properties of the transition and impacting the CP-violating observables. An accurate measurement of such observables can thus hint the presence of New Physics. The decay Bs0 → K∗0(→ K+π−)K ̄∗0(→ K−π+) is a golden channel for LHCb. The observable to be measured in this case is the weak phase φs, arising in the interference between the amplitudes of Bs0 mesons decaying directly into K∗0K ̄∗0 and those decaying after Bs0 − B ̄s0 oscillation. It is possible to generalise this framework to include other (non K∗0) Kπ components in the decay chain, increasing the available statistics and thus the accuracy of the measurement. In this talk, the first analysis aimed at measuring φs in Bs0 → (K+π−)(K−π+) decays, with the Kπ pairs arranged in different spin configurations (0, 1 and 2), is presented.
Speaker: Mr. Julián García Pardiñas (Universidade de Santiago de Compostela)
• 15:55
Search for Higgs boson production in association with a top-antitop quark pair in CMS 30m
A search for a Higgs boson production in assotiation with a top-antitop quark pair is presented in pp collisions at $\sqrt{s} =$ 13 TeV recorded by CMS. We target topologies in which the scalar boson decays into $WW^*$, $ZZ^*$ and $\tau\tau$ and at least one of the top quarks decays leptonically by selecting events with two same-sign, three or four leptons in the final state. The search results in a measured cross-section of $1.5 \pm 0.5$ times the expectations of the Standard Model, which corresponds to 3 standard deviations with respect to the no $t\bar{t}H$ production hypothesis.
Speaker: Sergio Sanchez Cruz (Universidad de Oviedo)
• 16:25
Measurement of polarisation fractions and CP asymmetries in charmless B0(s) decays at LHCb 30m
Within the Standard Model (SM) framework, charmless b decays proceeding via tree diagrams are suppressed by the smallness of the |Vub| term in the CKM matrix. Their contribution to the final decay rate is, therefore, of a similar order of magnitude of the otherwise sub-leading penguin process. This situation enhances the interference effects between the two processes and allows the measurement of their relative weak phase difference. The relative importance of the penguin diagrams in charmless processes could allow the detection of new particles entering in the loops which would cause deviations from the branching fractions and CP asymmetries predicted by the SM. The LHCb detector consists of a single-arm forward spectrometer specifically designed for flavour physics. The characteristics of this design include a very good vertex and tracking resolution, a fully instrumented forward coverage that maximizes the acceptance of the bb quark pairs produced at the LHC and a very efficient particle identification (PID) system separating protons, pions and kaons in the full acceptance. Together with a high performing trigger, these vertexing and PID efficiencies are crucial in order to study flavour physics in the very complicated hadronic environment of the LHC. In this talk the latest results on charmless b decays by the LHCb collaboration will be presented, with particular emphasis on the amplitude analysis of the B0->(pi pi)(K pi) decay. This includes the multidimensional analysis of the invariant masses and helicity angles, which allows to measure the polarisation fractions, direct CP violation and triple product asymmetries
Speaker: Mrs. María Vieites Díaz (Universidade de Santiago de Compostela)
• 16:55
The light detection system for the WA105/ProtoDUNE-DP neutrino detector at CERN 30m
Short description of the two prototypes of the WA105 experiment. Description of the light detection system for the experiment. Main results of the PMTs characterization.
Speaker: Ms. Chiara Filomena Lastoria (CIEMAT (Madrid))
• 17:25
Photon Polarization in Radiative Bs Decays at LHCb 30m
The photon polarization in radiative Bs decays has been studied for the first time at LHCb using Run I data. Also it is discuss the ongoing analysis using Run II data, the time-dependent analysis of the Bs→φγ decay rate adding the information of the flavour of the Bs candidates at production.
Speaker: Mrs. Clara Remon Alepuz (PhD Student)
• 17:55
Unitarized EFT for a strongly interacting BSM Electroweak Sector coupled with ttbar 30m
We use the nonlinear electroweak chiral Lagrangian (EChL) and the mathematical properties of the S-matrix (encoded into unitarization methods) for sampling the collider phenomenology of a (hypothetical) strongly interacting electroweak symmetry breaking sector (EWSBS) coupled with ttbar states. The EChL Lagrangian is used as an intermediate energy approximation (E~500 GeV), where the Equivalence Theorem is valid but the EFT does not violate unitarity. Of highest interest is the EWSBS and the description of the scattering processes between longitudinally polarized gauge bosons and the Higgs-like particle discovered at the LHC. Because ttbar channel is more accessible at the LHC, we couple such processes with ttbar. Hence, we use the A[W_L,Z_L,h-->W_L,Z_L,h] scattering amplitudes computed at NLO, and consider a weak (perturbative) coupling with ttbar states, in order to compute the A[W_L,Z_L,h-->t tbar] scattering amplitudes. Unitarization procedures are used to extend the validity range of the EFT up to the first resonance, where the EFT perturbative expansion breaks down. We develop a modified version of several unitarization procedures in order to simplify the computation by considering that coupling with ttbar states is perturbative..
• 15:30 19:10
Física Médica II Aula Química Orgánica (Facultad de Química (USC))

### Aula Química Orgánica

• 15:30
Bioimagen coherent en free-electron lasers: éxitos y retos 15m
Los free-electron lasers han supuesto una gran revolución en el ámbito de la imagen coherente, permitiendo explorar simultáneamente resoluciones espaciales y temporales en torno al ångström y el femtosegundo. Además, dado que generan un haz coherente en el espectro de los rayos X, permiten utilizar técnicas de imagen coherente similares a las utilizadas con láseres en el visible. Concretamente, estas técnicas tienen el potencial de fotografiar células y sistemas biológicos con resoluciones atómicas y filmar películas de procesos con 10 15 fotogramas por segundo. En esta presentación discutiremos los últimos resultados obtenidos con técnicas coherentes desarrolladas para obtener imágenes de sistemas biológicos en free-electron lasers. Finalmente, mencionaremos las limitaciones, retos y posibles soluciones de estas técnicas utilizadas en free-electron lasers para bioimagen.
Speaker: Dr. Pablo Villanueva Perez (DESY-CFEL)
• 15:45
Complete Validation of Biograph mCT PET with Monte Carlo simulation: GATE and STIR. 15m
The Geant Application for Tomographic Emission (GATE) is a simulation platform based on GEANT4, which is designed to perform numerical simulation in medical imaging and radiotherapy. The purpose of our study is to validate a GATE model of the commercial PET/CT Siemens Biograph placed at the University Hospital of Salamanca (Spain). The geometry of the system was implemented including the detector ring, crystal blocks, PMTs,etc. The GATE simulation results were reconstructed with analytical and iterative algorithms using STIR (Software for Tomographic Image Recostruction), an open source software for 3D PET and SPECT image reconstruction. Simulated data were compared to experimental results obtanied using the NEMA NU-2-2007 standard protocols. It consisted of sensitivity estimation, count rate, NEC curve, scatter fraction, spatial resolution and image quality (hot and cold contrasts, atenuation in the lung and percent background variability). The reults for 2D and 3D sensitivity, scatter fraction, count rate and parameters referring to the image quality were found to agree with experimental values. The simulated sensitivity obtained is 10.9 cps/kBq in the center of the transaxial field of view and 8.85 cps/kBq at 10cm. Excellent agreement between simulation and experiment can be seen in the spatial resolution results, FWHM being 5.288 mm at 1 cm with GATE and 5.280 mm at 1 cm experimentally. Simulated Scatter dispersion was 35.1% for a concentration of 2.48 kBq/mL, a value was lower than that provided by the manufacturer. In conclusion, our study showed that our Monte Carlo model can be used to optimize,simplify and reduce the simulation time for the quality control procedure of PET scanners.
Speaker: Ms. Lorena Vázquez Canelas (Universidad de Salamanca)
• 16:00
High throughput production of solid targets for laser-driven particles acceleration through MEMS based processing. 15m
Laser-driven particle acceleration is reasonably feeding the hope for the development of compact particle accelerators relying on the ultra-intense interaction established when a high power, ultra-short, laser (HPL) pulse is focused on a very tiny area of a solid target surface. [1]. Laser-driven ion acceleration has been observed since early experiments of solid target irradiation with lasers, and it has been explained in the framework of Target Normal Sheath Acceleration (TNSA) model. Particle acceleration originates from the rear surface of a solid target, typically a thin metallic foil, and is caused by the charge separation field generated by laser-plasma interaction on the front target surface at laser intensities of 1018÷1020 W/cm2 (Fig.1 (a)). Until now, targets supply strategies have been principally based on fabrication and assembly on an individual basis. However, this approach is not suitable to exploit the full potential of high repetition rate HPLs. Therefore, the development of high throughput target fabrication processing for ultra-intense laser-plasma experiments is receiving many efforts. In this regard, the approach based on micro-/nano-electromechanical systems (N/MEMS) technology, which evolved from semiconductor device manufacturing, is a very attractive solution [2]. It provides, in fact, parallel processing and the possibility to achieve complex target design with micro-nano sized features on a variety of materials. Here, we present the fabrication of thin layer membranes made by aluminum, both free-standing and supported by a nanometric thickness of SiO2, embedded in a silicon frame. Membranes were fabricated with variable SiO2 and aluminum thicknesses according the route schematized in Fig. 1(b), which combines photolithography, thin layer deposition techniques, wet and dry etching. Both wafer sides were processed in such a way to obtain, on front side, the openings for the aluminum membranes which are then deposited by sputtering on the back side, with thicknesses equal to 0.25, 0.5 and 1 micron, respectively. Some of the obtained targets are shown in Fig.1(c) characterized by optical, electron, and confocal microscopy. Individual targets contain up to 16, 1 mm2 membranes available for experiments, and were used for laser-plasma experiments at the laser installation of Proton Laser Applications, S.L., which has developed a table-top laser system running at 3 TW with an intrinsic repetition rate up to 100 Hz [3]. The experimental setup is schematized in Fig. 1(d) showing in detail the interaction chamber where targets are easily located thanks to a purpose made holder which carries up to 16 individual targets, resulting in 256 membranes available for consecutive shots. Results of preliminary experiments, represented in Fig.1 (e) for 0.5 μm aluminum membranes, show the achievement of successful proton acceleration up to 2 MeV almost constant within the spanned focal plane (distances from focus position are listed in the legend, in microns), and having the peak value in the focus, as expected. This maximum energy is slightly higher than previous results from plain foils, and corresponds to the expectations with respect to the laser energy on target. We expect to improve this performance by further developments of our system directed from one side to increase the laser pulse energy, and from the other, to involve more sophisticated target designs with micro-nano texturized surfaces which, according to particle-in-cell simulations [4], should improve the coupling, and thus, the acceleration results.
Speaker: Dr. rosa letizia zaffino (instituto de microelectronica de barcelona, IMB-CNM)
• 16:15
Design concept and pilot tests of dedicated two panels prostate PET 15m
The main goal of this project (called PROSPET) is the development of a PET system for early diagnostic, treatment and following prostate cancer (PCa). It will also allow us for PCa biopsy guiding using real time PET. We aim to significantly improve the efficiency and the spatial resolution in the detection of PCa, when compared to whole body PET scanners. The design of this dedicated PET is based on two panels of detectors surrounding the patient abdomen (nearing the hip). In order to estimate the improvement and to evaluate possible artefacts due to the particular design, we have run simulations using GATE, a Geant4 platform.
Speaker: Mr. Cañizares-Ledo Gabriel (I3M)
• 16:30
Electromagnetic metamaterials for magnetic resonance imaging in medicine 15m
Metamaterials are artificial composites whose electromagnetic properties can be engineered to achieve any value of effective permittivity and/or permeability. Metamaterials can be designed with a negative permittivity/permeability to behave as a lens for the electric/ magnetic field. The ability of metamaterial lenses with negative permeability to increase the signal-to-noise ratio (SNR) in magnetic resonance imaging (MRI) has been investigated. Moreover, it has been also analyzed the ability of metamaterial slabs with zero/high permeability to reject/confine the RF magnetic field in MRI systems and thus to locally increase the SNR. Finally, the ability of metamaterial lenses to localize the field of view of MRI coils in an array and thus to reduce the noise correlation has been also investigated. This has application in parallel MRI to reduce the acquisition time of the image.
Speaker: Prof. Manuel Freire (Universidad de Sevilla)
• 16:45
Coffee break 30m
• 17:15
Estimación del ángulo de Cobb con métodos aprendizaje máquina a partir de imágenes topográficas de la superficie de la espalda, obtenidas con luz estructurada 15m